Email infrastructure of datart.cz
According to Live Direct Marketing's daily DNS scan (September 7, 2026), datart.cz (Tranco rank #19,346) points its inbound MX to Microsoft 365 and authorizes Mailgun, Heureka Mailing (CZ) in SPF. Its observed DMARC policy is p=reject. Across this dataset, 47% of DMARC publishers use an enforcing policy; this does not show where a specific message landed.
Last updated: .
| Mailbox provider (MX) | Microsoft 365 |
|---|---|
| ESPs in SPF | Mailgun, Heureka Mailing (CZ) |
| SaaS senders in SPF | none detected |
| DMARC policy | p=reject |
| DMARC record | v=DMARC1; p=reject; rua=mailto:c660abe184@rua.easydmarc.eu; ruf=mailto:c660abe184@ruf.easydmarc.eu; fo=1 |
| Tranco rank | #19,346 |
| Snapshot | 2026-09-07 (updated daily) |
Keep an eye on datart.cz
Get a first health report, then meaningful changes to SPF, DMARC, MX, sampled MX PTR and blocklists. See your domain history and run a real inbox placement test from your private watchlist.
Manage existing subscriptions →How datart.cz compares
Same daily dataset, three views: how its mailbox provider is trending, how strict DMARC is at its position in the list, and where its own policy sits among all DMARC publishers in the dataset.
Market share of Microsoft 365
DMARC enforced by list position
Policy maturity of all DMARC publishers
From observation to a useful check
- What was observed
- The DNS records and classifications in this snapshot.
- What it means
- MX describes inbound mail; SPF authorizes senders.
- What is unknown
- The actual sending IP, nested SPF dependencies, inbox placement and commercial relationships. MTA-STS, TLS-RPT and BIMI adoption are not measured.
- Next check
- Verify current DNS and test a real message: run an inbox placement test.
DNS records
Source: OpenINTEL / Tranco. Capture: 2026-09-07. These are answers from the measurement vantage point, not a live DNS check. TTL is the observed cache lifetime in seconds.
datart.cz · A — Answer records observed
IPv4 addresses for this name. They do not identify the mail server or prove a hosting migration.
Query observed at: 2026-09-07T00:33:22Z.
Response code: 0.
- datart.cz · A · TTL 300 s · 2026-09-07T00:33:22Z · AD=1
185.115.1.165 - datart.cz · RRSIG · TTL 300 s · 2026-09-07T00:33:22Z · AD=1
algorithm=13; key_tag=65189; labels=2; original_ttl=300; signature=54b87ee7e67ef59c5477a134f24ba7276b51c8639f85b19bf35846cedaf829998161143d85d1460a6790793b9c5acb085dbe4ffa49befd7b38f7c70d3bd17af0; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=A
datart.cz · AAAA — Unknown: no conclusive answer in this capture
IPv6 addresses for this name. An address record does not test service availability.
datart.cz · NS — Answer records observed
Name servers listed for the DNS zone.
Query observed at: 2026-09-07T00:33:22Z.
Response code: 0.
- datart.cz · NS · TTL 1800 s · 2026-09-07T00:33:22Z · AD=1
hptronic1.ns.nic.cz. - datart.cz · NS · TTL 1800 s · 2026-09-07T00:33:22Z · AD=1
hptronic2.ns.nic.cz. - datart.cz · RRSIG · TTL 1800 s · 2026-09-07T00:33:22Z · AD=1
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=4ebd95be8ecc7ad05015fef36cc21a654dc3efd744ad1c6d0a2a87b6a76874042922f2797c0f62ebc85ea28dab10d7c24b9c0e3cbc36716190c82b04fedd3af0; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=NS
datart.cz · MX — Answer records observed
Servers named to receive mail. Lower preference numbers are tried first.
Query observed at: 2026-09-07T00:33:23Z.
Response code: 0.
- datart.cz · MX · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1
1 datart-cz.mail.protection.outlook.com. - datart.cz · RRSIG · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=2058fb9c35708453db8f3e73ff7e906bb6c7ac987f6084936d21c9ea25796fcd1ab1719dbf411b37f32c8e6b84a45adff86a8bd20d14a3db1326b03e59da9e25; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=MX
datart.cz · SOA — Answer records observed
Zone administration data. The serial is a version number, not a creation date or clock.
Query observed at: 2026-09-07T00:33:22Z.
Response code: 0.
- datart.cz · RRSIG · TTL 1800 s · 2026-09-07T00:33:22Z · AD=1
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=2080c51bdb87be2379ed58a57d0512f3f58f825c92652d1dedadeab4c221ed0cafaba26a3b7025c1c386750edb4abab149448a0178b532f6571c17f072f0a783; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=SOA - datart.cz · SOA · TTL 1800 s · 2026-09-07T00:33:22Z · AD=1
expire=1209600; minimum=7200; mname=hptronic1.ns.nic.cz.; refresh=14400; retry=3600; rname=hostmaster.nic.cz.; serial=1695317955
datart.cz · CAA — Answer records observed
Rules for certificate issuance. These do not show whether an existing certificate is valid.
Query observed at: 2026-09-07T00:33:23Z.
Response code: 0.
- datart.cz · CAA · TTL 3600 s · 2026-09-07T00:33:23Z · AD=1
flags=0; tag=iodef; value="mailto:ssl-certifikaty@hptronic.cz" - datart.cz · CAA · TTL 3600 s · 2026-09-07T00:33:23Z · AD=1
flags=0; tag=issue; value="digicert.com" - datart.cz · CAA · TTL 3600 s · 2026-09-07T00:33:23Z · AD=1
flags=0; tag=issue; value="letsencrypt.org" - datart.cz · CAA · TTL 3600 s · 2026-09-07T00:33:23Z · AD=1
flags=0; tag=issue; value="sectigo.com" - datart.cz · CAA · TTL 3600 s · 2026-09-07T00:33:23Z · AD=1
flags=0; tag=issue; value="trust-provider.com" - datart.cz · RRSIG · TTL 3600 s · 2026-09-07T00:33:23Z · AD=1
algorithm=13; key_tag=65189; labels=2; original_ttl=3600; signature=a4ff56ce62391ae61e5e637ee20c2a3d101372edf430ff71bda231637f26fdab861113eb194daadaf3617efbd69b7cb65445ac01df61204ba0074caccd6bb295; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=CAA
datart.cz · TXT — Answer records observed
Text records can publish mail policies, domain-control challenges or other data.
Query observed at: 2026-09-07T00:33:23Z.
Response code: 0.
- datart.cz · RRSIG · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=3f40c74397dbea644031edebdacd8b2338d4c3eb65108e7705ad8403473dc7d1dc3661d02fe5dfcb8a716c1db40bf67abe87d6cf616c4e0a0147e5179bafc886; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=TXT Domain-control verification for Microsoft; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"MS=ms10022603"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"YDVJVu1kGaC4rBF4jd89EhLcxQpCiZn+birAUPCa1X321KaolhA2/Tfx64CN2+9i+UB4OYZFPyuRx8WS/Zjf6A=="Domain-control verification for Adobe IDP; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"adobe-idp-site-verification=0d294d84-8d93-4bf9-bc62-7e762ace54d5"Domain-control verification for Atlassian (Jira / Confluence); not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"atlassian-domain-verification=xqivzprqb5s8+ljLwlwSqdyAeYao7CaZUMQlRpnNbiobMRBB0CLRqWSfGioKNNY8"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"google-gws-recovery-domain-verification=53356196"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"google-site-verification=D4yGlIwb65HvIny_LQVZ_ITwmXKEufkCBHPuHqAxlZo"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"google-site-verification=hO4k1sFr8TmKeNBOcJrBZ1g6e47Lgi44V-9f8etoqis"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"google-site-verification=ik2KWliFBZv0Pm_qoMeITGUkyx0WtCozwbfl6xXJ2Gk"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"google-site-verification=nDZmKItCL40j08IaqyH8hpmcPLmzhIXMPSEklGkk_1s"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"google-site-verification=yTXqeX2HG9RzlbfMioNA-iOTafJLxZB9o00wmCDPraQ"SPF: authorized mail senders; not proof that mail was sent.
Raw TXT value
datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"v=spf1 include:spf.hptronic.cz include:_emailing.heureka.cz include:spf.protection.outlook.com include:mailgun.org -all"
datart.cz · DNSKEY — Answer records observed
DNSSEC key, signature or denial-of-existence data observed in this response.
Query observed at: 2026-09-07T00:33:23Z.
Response code: 0.
- datart.cz · DNSKEY · TTL 1800 s · 2026-09-07T00:33:23Z · AD=0
algorithm=13; flags=256; pk_eccgost_x=8571b8baf16c9745604aee9f2ffc1d28b106c9b9b1cf3f5cdf6cd1ce1286c75e; pk_eccgost_y=1427773fa3c72bb387f6d608e0ba9857b7538e74453e7304bfac091e6d6f3a66; protocol=3 - datart.cz · DNSKEY · TTL 1800 s · 2026-09-07T00:33:23Z · AD=0
algorithm=13; flags=257; pk_eccgost_x=9f2a6c5a2a975bcd8f7e5c36004160fded5884bddc9e55c66bc496b0ac4bae90; pk_eccgost_y=8f0a81ee6c005093ac702e42026382cf9687327361595b8c163494804749e8c9; protocol=3 - datart.cz · RRSIG · TTL 1800 s · 2026-09-07T00:33:23Z · AD=0
algorithm=13; key_tag=29394; labels=2; original_ttl=1800; signature=0b0bf832b5005a51079497c23fb659bea68b19a2e85db4ba3f90bf56b8c533e5e3ae533a81ad6d9b5bae8cdee2f6e05dd8729da778f7e96753cdb2d71e34199c; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=DNSKEY
datart.cz · DS — Answer records observed
DNSSEC key, signature or denial-of-existence data observed in this response.
Query observed at: 2026-09-07T00:33:23Z.
Response code: 0.
- datart.cz · DS · TTL 3600 s · 2026-09-07T00:33:23Z · AD=0
algorithm=13; digest=01b0343e89952364822a5fecef56a273d87ee3c9bfe4137e2da4d2a33e7fc882; digest_type=2; key_tag=29394 - datart.cz · RRSIG · TTL 3600 s · 2026-09-07T00:33:23Z · AD=0
algorithm=13; key_tag=10850; labels=2; original_ttl=3600; signature=4cdec02ef3fcd85b334d850a43aa68277779e413ba719f3ade04eed82c08cd202d5df7126c8b265329f4c0c25c03ef747a77cd42000de63467751b7ceb966d95; signature_expiration=1788862894; signature_inception=1787647894; signer_name=cz.; type_covered=DS
datart.cz · CDS — Unknown: no conclusive answer in this capture
DNSSEC key, signature or denial-of-existence data observed in this response.
datart.cz · CDNSKEY — Unknown: no conclusive answer in this capture
DNSSEC key, signature or denial-of-existence data observed in this response.
www.datart.cz · A — Answer records observed
IPv4 addresses for this name. They do not identify the mail server or prove a hosting migration.
Query observed at: 2026-09-07T00:33:22Z.
Response code: 0.
- www.datart.cz · A · TTL 300 s · 2026-09-07T00:33:22Z · AD=1
185.115.1.165 - www.datart.cz · RRSIG · TTL 300 s · 2026-09-07T00:33:22Z · AD=1
algorithm=13; key_tag=65189; labels=3; original_ttl=300; signature=2eb8900329410a361d7b294388ccd5d83e7865d570ca7d3dae04f9dd857235f85626b8bdfedc191bd184d540ac26f1e14ebcb1dc29dfe4ff598a842f7e99fc77; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=A
www.datart.cz · AAAA — Unknown: no conclusive answer in this capture
IPv6 addresses for this name. An address record does not test service availability.
_dmarc.datart.cz · TXT — Answer records observed
Text records can publish mail policies, domain-control challenges or other data.
Query observed at: 2026-09-07T00:33:23Z.
Response code: 0.
- _dmarc.datart.cz · RRSIG · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1
algorithm=13; key_tag=65189; labels=3; original_ttl=1800; signature=271a4c54407acf96d573a06801438c4640251a16de9a90f2354adc481d849c9b0084aa4fe4a52e03fead3ade45b0d21ce11d913112f49b05521748a212391057; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=TXT DMARC: published handling and reporting policy for authentication failures.
Raw TXT value
_dmarc.datart.cz · TXT · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1"v=DMARC1; p=reject; rua=mailto:c660abe184@rua.easydmarc.eu; ruf=mailto:c660abe184@ruf.easydmarc.eu; fo=1"
datart.cz · NSEC3PARAM — Answer records observed
DNSSEC key, signature or denial-of-existence data observed in this response.
Query observed at: 2026-09-07T00:33:23Z.
Response code: 0.
- datart.cz · NSEC3PARAM · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1
flags=0; hash_algorithm=1; iterations=0; salt=00 - datart.cz · RRSIG · TTL 1800 s · 2026-09-07T00:33:23Z · AD=1
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=822b83e048f69b5c04a46f3b7517434a7ec1b521935d555186b938c8595a92e46928b3b9aeb0f2a6b6813f209bb3ae07ff7e79388acdffb2aa3da63df43b384f; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz.; type_covered=NSEC3PARAM
DNSSEC records are shown only when returned. An unset AD flag is not proof that a zone is unsigned. MTA-STS, TLS-RPT, BIMI and arbitrary DKIM selectors are not measured here; their absence cannot be inferred.
Recorded DNS history
Registry presence: first seen 2026-04-28; last seen 2026-09-07. These are appearances in our domain registry, not domain registration dates or earlier DNS values.
This history starts with saved RR captures. Provider market-share charts are aggregate context, not this domain’s DNS history. Dates identify observations; no continuous validity between them is implied. Equivalent RR states are combined, ignoring response TTL and capture-time changes. Up to 30 distinct RR states and 60 dated captures are retained within a per-domain byte limit.
Recent observed differences
2026-09-05 → 2026-09-07
_dmarc.datart.cz · TXT
Before: 2026-09-05 — Answer records observed
- _dmarc.datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=3; original_ttl=1800; signature=86e14cd2e1985d72d2d3a76540f62439a579367a8b252ed7608bb757e2e16d8fdc72580dd2e8cc61a5e6e1caf1891c4a13387ec5c79446bb654819f308c3cd18; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=TXT DMARC: published handling and reporting policy for authentication failures.
Raw TXT value
_dmarc.datart.cz · TXT"v=DMARC1; p=reject; rua=mailto:c660abe184@rua.easydmarc.eu; ruf=mailto:c660abe184@ruf.easydmarc.eu; fo=1"
After: 2026-09-07 — Answer records observed
- _dmarc.datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=3; original_ttl=1800; signature=271a4c54407acf96d573a06801438c4640251a16de9a90f2354adc481d849c9b0084aa4fe4a52e03fead3ade45b0d21ce11d913112f49b05521748a212391057; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=TXT DMARC: published handling and reporting policy for authentication failures.
Raw TXT value
_dmarc.datart.cz · TXT"v=DMARC1; p=reject; rua=mailto:c660abe184@rua.easydmarc.eu; ruf=mailto:c660abe184@ruf.easydmarc.eu; fo=1"
datart.cz · A
Before: 2026-09-05 — Answer records observed
- datart.cz · A
185.115.1.165 - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=300; signature=16de6d25ebdee3ea05de3f37a6d0514df9a4179ae68b767a97a497a9af4ed62b9c631dfab6afe72d4d06b13e6ed9a69856c76d8449d5f009e7a60eb5e0f850f5; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=A
After: 2026-09-07 — Answer records observed
- datart.cz · A
185.115.1.165 - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=300; signature=54b87ee7e67ef59c5477a134f24ba7276b51c8639f85b19bf35846cedaf829998161143d85d1460a6790793b9c5acb085dbe4ffa49befd7b38f7c70d3bd17af0; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=A
datart.cz · CAA
Before: 2026-09-05 — Answer records observed
- datart.cz · CAA
flags=0; tag=iodef; value="mailto:ssl-certifikaty@hptronic.cz" - datart.cz · CAA
flags=0; tag=issue; value="digicert.com" - datart.cz · CAA
flags=0; tag=issue; value="letsencrypt.org" - datart.cz · CAA
flags=0; tag=issue; value="sectigo.com" - datart.cz · CAA
flags=0; tag=issue; value="trust-provider.com" - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=3600; signature=84d18a195aa5aa58841ba6349c5acd849c6f466aac370764b93c5528d73c81b4f440152b6fb4428d09b44d9834ffb4133b6eca8e5205646493b6ecacc913695b; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=CAA
After: 2026-09-07 — Answer records observed
- datart.cz · CAA
flags=0; tag=iodef; value="mailto:ssl-certifikaty@hptronic.cz" - datart.cz · CAA
flags=0; tag=issue; value="digicert.com" - datart.cz · CAA
flags=0; tag=issue; value="letsencrypt.org" - datart.cz · CAA
flags=0; tag=issue; value="sectigo.com" - datart.cz · CAA
flags=0; tag=issue; value="trust-provider.com" - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=3600; signature=a4ff56ce62391ae61e5e637ee20c2a3d101372edf430ff71bda231637f26fdab861113eb194daadaf3617efbd69b7cb65445ac01df61204ba0074caccd6bb295; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=CAA
datart.cz · DNSKEY
Before: 2026-09-05 — Answer records observed
- datart.cz · DNSKEY
algorithm=13; flags=256; pk_eccgost_x=8571b8baf16c9745604aee9f2ffc1d28b106c9b9b1cf3f5cdf6cd1ce1286c75e; pk_eccgost_y=1427773fa3c72bb387f6d608e0ba9857b7538e74453e7304bfac091e6d6f3a66; protocol=3 - datart.cz · DNSKEY
algorithm=13; flags=257; pk_eccgost_x=9f2a6c5a2a975bcd8f7e5c36004160fded5884bddc9e55c66bc496b0ac4bae90; pk_eccgost_y=8f0a81ee6c005093ac702e42026382cf9687327361595b8c163494804749e8c9; protocol=3 - datart.cz · RRSIG
algorithm=13; key_tag=29394; labels=2; original_ttl=1800; signature=baa1d19702ad2653ff0d0a74efbac9463fb7735a81e84c5767b8f7e4edb4262c87e405e8c2877caeebf9a3cb538e807d713014434c81a65544b80f45f424be37; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=DNSKEY
After: 2026-09-07 — Answer records observed
- datart.cz · DNSKEY
algorithm=13; flags=256; pk_eccgost_x=8571b8baf16c9745604aee9f2ffc1d28b106c9b9b1cf3f5cdf6cd1ce1286c75e; pk_eccgost_y=1427773fa3c72bb387f6d608e0ba9857b7538e74453e7304bfac091e6d6f3a66; protocol=3 - datart.cz · DNSKEY
algorithm=13; flags=257; pk_eccgost_x=9f2a6c5a2a975bcd8f7e5c36004160fded5884bddc9e55c66bc496b0ac4bae90; pk_eccgost_y=8f0a81ee6c005093ac702e42026382cf9687327361595b8c163494804749e8c9; protocol=3 - datart.cz · RRSIG
algorithm=13; key_tag=29394; labels=2; original_ttl=1800; signature=0b0bf832b5005a51079497c23fb659bea68b19a2e85db4ba3f90bf56b8c533e5e3ae533a81ad6d9b5bae8cdee2f6e05dd8729da778f7e96753cdb2d71e34199c; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=DNSKEY
datart.cz · MX
Before: 2026-09-05 — Answer records observed
- datart.cz · MX
1 datart-cz.mail.protection.outlook.com - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=8a264f837b03bc93875ea6df8f0aeb458d3f6739c3791e030fd328d3633a8069e99957c7234d8913f8e9aa274e6e9b2ff715a16645e1f2b852cf23a6971ad181; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=MX
After: 2026-09-07 — Answer records observed
- datart.cz · MX
1 datart-cz.mail.protection.outlook.com - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=2058fb9c35708453db8f3e73ff7e906bb6c7ac987f6084936d21c9ea25796fcd1ab1719dbf411b37f32c8e6b84a45adff86a8bd20d14a3db1326b03e59da9e25; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=MX
datart.cz · NS
Before: 2026-09-05 — Answer records observed
- datart.cz · NS
hptronic1.ns.nic.cz - datart.cz · NS
hptronic2.ns.nic.cz - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=1297357f7964a984a8cf4d278d69501cf6869adcf5d7fb123d41eb6eccce5b15700a292b2c5f5c7935baf01a5e5a58b9209382f801b79c0879d96fce7e948d07; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=NS
After: 2026-09-07 — Answer records observed
- datart.cz · NS
hptronic1.ns.nic.cz - datart.cz · NS
hptronic2.ns.nic.cz - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=4ebd95be8ecc7ad05015fef36cc21a654dc3efd744ad1c6d0a2a87b6a76874042922f2797c0f62ebc85ea28dab10d7c24b9c0e3cbc36716190c82b04fedd3af0; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=NS
datart.cz · NSEC3PARAM
Before: 2026-09-05 — Answer records observed
- datart.cz · NSEC3PARAM
flags=0; hash_algorithm=1; iterations=0; salt=00 - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=b0157fb42133bb6b9ae4aab84ab263f98d834b94fa0ec4e9f8ee9a2ebb1b1b3d0a43e24cce6abf318a79ca6b66fcf326b70b66b8be7a1a7cbe6373c9895eae19; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=NSEC3PARAM
After: 2026-09-07 — Answer records observed
- datart.cz · NSEC3PARAM
flags=0; hash_algorithm=1; iterations=0; salt=00 - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=822b83e048f69b5c04a46f3b7517434a7ec1b521935d555186b938c8595a92e46928b3b9aeb0f2a6b6813f209bb3ae07ff7e79388acdffb2aa3da63df43b384f; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=NSEC3PARAM
datart.cz · SOA
Before: 2026-09-05 — Answer records observed
- datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=f7a9f786a2048cd60bcee013644a79e5a3ea1d1cc4557d63f0c7c5e8b0bf16c4258bbd4e472d2474bd1fb31de06ba8ee9213e9607b820cc4b84b13e856d7a4b0; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=SOA - datart.cz · SOA
expire=1209600; minimum=7200; mname=hptronic1.ns.nic.cz; refresh=14400; retry=3600; rname=hostmaster.nic.cz; serial=1695317954
After: 2026-09-07 — Answer records observed
- datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=2080c51bdb87be2379ed58a57d0512f3f58f825c92652d1dedadeab4c221ed0cafaba26a3b7025c1c386750edb4abab149448a0178b532f6571c17f072f0a783; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=SOA - datart.cz · SOA
expire=1209600; minimum=7200; mname=hptronic1.ns.nic.cz; refresh=14400; retry=3600; rname=hostmaster.nic.cz; serial=1695317955
datart.cz · TXT
Before: 2026-09-05 — Answer records observed
- datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=6bffed09cc3962ccd23a8cea50e8f8449cbb82f783ba54e7770aed4e6b1c9d175a5b0745320eb6997b2f37eead1f61043629fbc129b56407d7f2ab878dfe7445; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=TXT Domain-control verification for Microsoft; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"MS=ms10022603"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT"YDVJVu1kGaC4rBF4jd89EhLcxQpCiZn+birAUPCa1X321KaolhA2/Tfx64CN2+9i+UB4OYZFPyuRx8WS/Zjf6A=="Domain-control verification for Adobe IDP; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"adobe-idp-site-verification=0d294d84-8d93-4bf9-bc62-7e762ace54d5"Domain-control verification for Atlassian (Jira / Confluence); not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"atlassian-domain-verification=xqivzprqb5s8+ljLwlwSqdyAeYao7CaZUMQlRpnNbiobMRBB0CLRqWSfGioKNNY8"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT"google-gws-recovery-domain-verification=53356196"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=D4yGlIwb65HvIny_LQVZ_ITwmXKEufkCBHPuHqAxlZo"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=hO4k1sFr8TmKeNBOcJrBZ1g6e47Lgi44V-9f8etoqis"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=ik2KWliFBZv0Pm_qoMeITGUkyx0WtCozwbfl6xXJ2Gk"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=nDZmKItCL40j08IaqyH8hpmcPLmzhIXMPSEklGkk_1s"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=yTXqeX2HG9RzlbfMioNA-iOTafJLxZB9o00wmCDPraQ"SPF: authorized mail senders; not proof that mail was sent.
Raw TXT value
datart.cz · TXT"v=spf1 include:spf.hptronic.cz include:_emailing.heureka.cz include:spf.protection.outlook.com include:mailgun.org -all"
After: 2026-09-07 — Answer records observed
- datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=3f40c74397dbea644031edebdacd8b2338d4c3eb65108e7705ad8403473dc7d1dc3661d02fe5dfcb8a716c1db40bf67abe87d6cf616c4e0a0147e5179bafc886; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=TXT Domain-control verification for Microsoft; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"MS=ms10022603"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT"YDVJVu1kGaC4rBF4jd89EhLcxQpCiZn+birAUPCa1X321KaolhA2/Tfx64CN2+9i+UB4OYZFPyuRx8WS/Zjf6A=="Domain-control verification for Adobe IDP; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"adobe-idp-site-verification=0d294d84-8d93-4bf9-bc62-7e762ace54d5"Domain-control verification for Atlassian (Jira / Confluence); not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"atlassian-domain-verification=xqivzprqb5s8+ljLwlwSqdyAeYao7CaZUMQlRpnNbiobMRBB0CLRqWSfGioKNNY8"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT"google-gws-recovery-domain-verification=53356196"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=D4yGlIwb65HvIny_LQVZ_ITwmXKEufkCBHPuHqAxlZo"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=hO4k1sFr8TmKeNBOcJrBZ1g6e47Lgi44V-9f8etoqis"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=ik2KWliFBZv0Pm_qoMeITGUkyx0WtCozwbfl6xXJ2Gk"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=nDZmKItCL40j08IaqyH8hpmcPLmzhIXMPSEklGkk_1s"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=yTXqeX2HG9RzlbfMioNA-iOTafJLxZB9o00wmCDPraQ"SPF: authorized mail senders; not proof that mail was sent.
Raw TXT value
datart.cz · TXT"v=spf1 include:spf.hptronic.cz include:_emailing.heureka.cz include:spf.protection.outlook.com include:mailgun.org -all"
www.datart.cz · A
Before: 2026-09-05 — Answer records observed
- www.datart.cz · A
185.115.1.165 - www.datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=3; original_ttl=300; signature=d62fab316da9f74653f99c418b8b95748a13e81402e48b9529d674a2855bdecc296a617875b00cfc028782cf2bbdbec6cd327002a11469fbc6db97abe5e629fb; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=A
After: 2026-09-07 — Answer records observed
- www.datart.cz · A
185.115.1.165 - www.datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=3; original_ttl=300; signature=2eb8900329410a361d7b294388ccd5d83e7865d570ca7d3dae04f9dd857235f85626b8bdfedc191bd184d540ac26f1e14ebcb1dc29dfe4ff598a842f7e99fc77; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=A
Available saved snapshots
2026-09-07
Each query below keeps its own observation date; unknown checks may retain older values.
_dmarc.datart.cz · TXT
2026-09-07 — Answer records observed
- _dmarc.datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=3; original_ttl=1800; signature=271a4c54407acf96d573a06801438c4640251a16de9a90f2354adc481d849c9b0084aa4fe4a52e03fead3ade45b0d21ce11d913112f49b05521748a212391057; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=TXT DMARC: published handling and reporting policy for authentication failures.
Raw TXT value
_dmarc.datart.cz · TXT"v=DMARC1; p=reject; rua=mailto:c660abe184@rua.easydmarc.eu; ruf=mailto:c660abe184@ruf.easydmarc.eu; fo=1"
datart.cz · A
2026-09-07 — Answer records observed
- datart.cz · A
185.115.1.165 - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=300; signature=54b87ee7e67ef59c5477a134f24ba7276b51c8639f85b19bf35846cedaf829998161143d85d1460a6790793b9c5acb085dbe4ffa49befd7b38f7c70d3bd17af0; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=A
datart.cz · CAA
2026-09-07 — Answer records observed
- datart.cz · CAA
flags=0; tag=iodef; value="mailto:ssl-certifikaty@hptronic.cz" - datart.cz · CAA
flags=0; tag=issue; value="digicert.com" - datart.cz · CAA
flags=0; tag=issue; value="letsencrypt.org" - datart.cz · CAA
flags=0; tag=issue; value="sectigo.com" - datart.cz · CAA
flags=0; tag=issue; value="trust-provider.com" - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=3600; signature=a4ff56ce62391ae61e5e637ee20c2a3d101372edf430ff71bda231637f26fdab861113eb194daadaf3617efbd69b7cb65445ac01df61204ba0074caccd6bb295; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=CAA
datart.cz · DNSKEY
2026-09-07 — Answer records observed
- datart.cz · DNSKEY
algorithm=13; flags=256; pk_eccgost_x=8571b8baf16c9745604aee9f2ffc1d28b106c9b9b1cf3f5cdf6cd1ce1286c75e; pk_eccgost_y=1427773fa3c72bb387f6d608e0ba9857b7538e74453e7304bfac091e6d6f3a66; protocol=3 - datart.cz · DNSKEY
algorithm=13; flags=257; pk_eccgost_x=9f2a6c5a2a975bcd8f7e5c36004160fded5884bddc9e55c66bc496b0ac4bae90; pk_eccgost_y=8f0a81ee6c005093ac702e42026382cf9687327361595b8c163494804749e8c9; protocol=3 - datart.cz · RRSIG
algorithm=13; key_tag=29394; labels=2; original_ttl=1800; signature=0b0bf832b5005a51079497c23fb659bea68b19a2e85db4ba3f90bf56b8c533e5e3ae533a81ad6d9b5bae8cdee2f6e05dd8729da778f7e96753cdb2d71e34199c; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=DNSKEY
datart.cz · DS
2026-09-07 — Answer records observed
- datart.cz · DS
algorithm=13; digest=01b0343e89952364822a5fecef56a273d87ee3c9bfe4137e2da4d2a33e7fc882; digest_type=2; key_tag=29394 - datart.cz · RRSIG
algorithm=13; key_tag=10850; labels=2; original_ttl=3600; signature=4cdec02ef3fcd85b334d850a43aa68277779e413ba719f3ade04eed82c08cd202d5df7126c8b265329f4c0c25c03ef747a77cd42000de63467751b7ceb966d95; signature_expiration=1788862894; signature_inception=1787647894; signer_name=cz; type_covered=DS
datart.cz · MX
2026-09-07 — Answer records observed
- datart.cz · MX
1 datart-cz.mail.protection.outlook.com - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=2058fb9c35708453db8f3e73ff7e906bb6c7ac987f6084936d21c9ea25796fcd1ab1719dbf411b37f32c8e6b84a45adff86a8bd20d14a3db1326b03e59da9e25; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=MX
datart.cz · NS
2026-09-07 — Answer records observed
- datart.cz · NS
hptronic1.ns.nic.cz - datart.cz · NS
hptronic2.ns.nic.cz - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=4ebd95be8ecc7ad05015fef36cc21a654dc3efd744ad1c6d0a2a87b6a76874042922f2797c0f62ebc85ea28dab10d7c24b9c0e3cbc36716190c82b04fedd3af0; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=NS
datart.cz · NSEC3PARAM
2026-09-07 — Answer records observed
- datart.cz · NSEC3PARAM
flags=0; hash_algorithm=1; iterations=0; salt=00 - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=822b83e048f69b5c04a46f3b7517434a7ec1b521935d555186b938c8595a92e46928b3b9aeb0f2a6b6813f209bb3ae07ff7e79388acdffb2aa3da63df43b384f; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=NSEC3PARAM
datart.cz · SOA
2026-09-07 — Answer records observed
- datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=2080c51bdb87be2379ed58a57d0512f3f58f825c92652d1dedadeab4c221ed0cafaba26a3b7025c1c386750edb4abab149448a0178b532f6571c17f072f0a783; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=SOA - datart.cz · SOA
expire=1209600; minimum=7200; mname=hptronic1.ns.nic.cz; refresh=14400; retry=3600; rname=hostmaster.nic.cz; serial=1695317955
datart.cz · TXT
2026-09-07 — Answer records observed
- datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=3f40c74397dbea644031edebdacd8b2338d4c3eb65108e7705ad8403473dc7d1dc3661d02fe5dfcb8a716c1db40bf67abe87d6cf616c4e0a0147e5179bafc886; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=TXT Domain-control verification for Microsoft; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"MS=ms10022603"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT"YDVJVu1kGaC4rBF4jd89EhLcxQpCiZn+birAUPCa1X321KaolhA2/Tfx64CN2+9i+UB4OYZFPyuRx8WS/Zjf6A=="Domain-control verification for Adobe IDP; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"adobe-idp-site-verification=0d294d84-8d93-4bf9-bc62-7e762ace54d5"Domain-control verification for Atlassian (Jira / Confluence); not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"atlassian-domain-verification=xqivzprqb5s8+ljLwlwSqdyAeYao7CaZUMQlRpnNbiobMRBB0CLRqWSfGioKNNY8"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT"google-gws-recovery-domain-verification=53356196"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=D4yGlIwb65HvIny_LQVZ_ITwmXKEufkCBHPuHqAxlZo"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=hO4k1sFr8TmKeNBOcJrBZ1g6e47Lgi44V-9f8etoqis"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=ik2KWliFBZv0Pm_qoMeITGUkyx0WtCozwbfl6xXJ2Gk"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=nDZmKItCL40j08IaqyH8hpmcPLmzhIXMPSEklGkk_1s"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=yTXqeX2HG9RzlbfMioNA-iOTafJLxZB9o00wmCDPraQ"SPF: authorized mail senders; not proof that mail was sent.
Raw TXT value
datart.cz · TXT"v=spf1 include:spf.hptronic.cz include:_emailing.heureka.cz include:spf.protection.outlook.com include:mailgun.org -all"
www.datart.cz · A
2026-09-07 — Answer records observed
- www.datart.cz · A
185.115.1.165 - www.datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=3; original_ttl=300; signature=2eb8900329410a361d7b294388ccd5d83e7865d570ca7d3dae04f9dd857235f85626b8bdfedc191bd184d540ac26f1e14ebcb1dc29dfe4ff598a842f7e99fc77; signature_expiration=1789852396; signature_inception=1788637396; signer_name=datart.cz; type_covered=A
2026-09-05
Each query below keeps its own observation date; unknown checks may retain older values.
_dmarc.datart.cz · TXT
2026-09-05 — Answer records observed
- _dmarc.datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=3; original_ttl=1800; signature=86e14cd2e1985d72d2d3a76540f62439a579367a8b252ed7608bb757e2e16d8fdc72580dd2e8cc61a5e6e1caf1891c4a13387ec5c79446bb654819f308c3cd18; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=TXT DMARC: published handling and reporting policy for authentication failures.
Raw TXT value
_dmarc.datart.cz · TXT"v=DMARC1; p=reject; rua=mailto:c660abe184@rua.easydmarc.eu; ruf=mailto:c660abe184@ruf.easydmarc.eu; fo=1"
datart.cz · A
2026-09-05 — Answer records observed
- datart.cz · A
185.115.1.165 - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=300; signature=16de6d25ebdee3ea05de3f37a6d0514df9a4179ae68b767a97a497a9af4ed62b9c631dfab6afe72d4d06b13e6ed9a69856c76d8449d5f009e7a60eb5e0f850f5; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=A
datart.cz · CAA
2026-09-05 — Answer records observed
- datart.cz · CAA
flags=0; tag=iodef; value="mailto:ssl-certifikaty@hptronic.cz" - datart.cz · CAA
flags=0; tag=issue; value="digicert.com" - datart.cz · CAA
flags=0; tag=issue; value="letsencrypt.org" - datart.cz · CAA
flags=0; tag=issue; value="sectigo.com" - datart.cz · CAA
flags=0; tag=issue; value="trust-provider.com" - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=3600; signature=84d18a195aa5aa58841ba6349c5acd849c6f466aac370764b93c5528d73c81b4f440152b6fb4428d09b44d9834ffb4133b6eca8e5205646493b6ecacc913695b; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=CAA
datart.cz · DNSKEY
2026-09-05 — Answer records observed
- datart.cz · DNSKEY
algorithm=13; flags=256; pk_eccgost_x=8571b8baf16c9745604aee9f2ffc1d28b106c9b9b1cf3f5cdf6cd1ce1286c75e; pk_eccgost_y=1427773fa3c72bb387f6d608e0ba9857b7538e74453e7304bfac091e6d6f3a66; protocol=3 - datart.cz · DNSKEY
algorithm=13; flags=257; pk_eccgost_x=9f2a6c5a2a975bcd8f7e5c36004160fded5884bddc9e55c66bc496b0ac4bae90; pk_eccgost_y=8f0a81ee6c005093ac702e42026382cf9687327361595b8c163494804749e8c9; protocol=3 - datart.cz · RRSIG
algorithm=13; key_tag=29394; labels=2; original_ttl=1800; signature=baa1d19702ad2653ff0d0a74efbac9463fb7735a81e84c5767b8f7e4edb4262c87e405e8c2877caeebf9a3cb538e807d713014434c81a65544b80f45f424be37; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=DNSKEY
datart.cz · DS
2026-09-05 — Answer records observed
- datart.cz · DS
algorithm=13; digest=01b0343e89952364822a5fecef56a273d87ee3c9bfe4137e2da4d2a33e7fc882; digest_type=2; key_tag=29394 - datart.cz · RRSIG
algorithm=13; key_tag=10850; labels=2; original_ttl=3600; signature=4cdec02ef3fcd85b334d850a43aa68277779e413ba719f3ade04eed82c08cd202d5df7126c8b265329f4c0c25c03ef747a77cd42000de63467751b7ceb966d95; signature_expiration=1788862894; signature_inception=1787647894; signer_name=cz; type_covered=DS
datart.cz · MX
2026-09-05 — Answer records observed
- datart.cz · MX
1 datart-cz.mail.protection.outlook.com - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=8a264f837b03bc93875ea6df8f0aeb458d3f6739c3791e030fd328d3633a8069e99957c7234d8913f8e9aa274e6e9b2ff715a16645e1f2b852cf23a6971ad181; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=MX
datart.cz · NS
2026-09-05 — Answer records observed
- datart.cz · NS
hptronic1.ns.nic.cz - datart.cz · NS
hptronic2.ns.nic.cz - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=1297357f7964a984a8cf4d278d69501cf6869adcf5d7fb123d41eb6eccce5b15700a292b2c5f5c7935baf01a5e5a58b9209382f801b79c0879d96fce7e948d07; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=NS
datart.cz · NSEC3PARAM
2026-09-05 — Answer records observed
- datart.cz · NSEC3PARAM
flags=0; hash_algorithm=1; iterations=0; salt=00 - datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=b0157fb42133bb6b9ae4aab84ab263f98d834b94fa0ec4e9f8ee9a2ebb1b1b3d0a43e24cce6abf318a79ca6b66fcf326b70b66b8be7a1a7cbe6373c9895eae19; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=NSEC3PARAM
datart.cz · SOA
2026-09-05 — Answer records observed
- datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=f7a9f786a2048cd60bcee013644a79e5a3ea1d1cc4557d63f0c7c5e8b0bf16c4258bbd4e472d2474bd1fb31de06ba8ee9213e9607b820cc4b84b13e856d7a4b0; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=SOA - datart.cz · SOA
expire=1209600; minimum=7200; mname=hptronic1.ns.nic.cz; refresh=14400; retry=3600; rname=hostmaster.nic.cz; serial=1695317954
datart.cz · TXT
2026-09-05 — Answer records observed
- datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=2; original_ttl=1800; signature=6bffed09cc3962ccd23a8cea50e8f8449cbb82f783ba54e7770aed4e6b1c9d175a5b0745320eb6997b2f37eead1f61043629fbc129b56407d7f2ab878dfe7445; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=TXT Domain-control verification for Microsoft; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"MS=ms10022603"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT"YDVJVu1kGaC4rBF4jd89EhLcxQpCiZn+birAUPCa1X321KaolhA2/Tfx64CN2+9i+UB4OYZFPyuRx8WS/Zjf6A=="Domain-control verification for Adobe IDP; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"adobe-idp-site-verification=0d294d84-8d93-4bf9-bc62-7e762ace54d5"Domain-control verification for Atlassian (Jira / Confluence); not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"atlassian-domain-verification=xqivzprqb5s8+ljLwlwSqdyAeYao7CaZUMQlRpnNbiobMRBB0CLRqWSfGioKNNY8"Other TXT data; its purpose is not established by this measurement.
Raw TXT value
datart.cz · TXT"google-gws-recovery-domain-verification=53356196"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=D4yGlIwb65HvIny_LQVZ_ITwmXKEufkCBHPuHqAxlZo"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=hO4k1sFr8TmKeNBOcJrBZ1g6e47Lgi44V-9f8etoqis"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=ik2KWliFBZv0Pm_qoMeITGUkyx0WtCozwbfl6xXJ2Gk"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=nDZmKItCL40j08IaqyH8hpmcPLmzhIXMPSEklGkk_1s"Domain-control verification for Google; not proof of active SaaS or mail use.
Raw TXT value
datart.cz · TXT"google-site-verification=yTXqeX2HG9RzlbfMioNA-iOTafJLxZB9o00wmCDPraQ"SPF: authorized mail senders; not proof that mail was sent.
Raw TXT value
datart.cz · TXT"v=spf1 include:spf.hptronic.cz include:_emailing.heureka.cz include:spf.protection.outlook.com include:mailgun.org -all"
www.datart.cz · A
2026-09-05 — Answer records observed
- www.datart.cz · A
185.115.1.165 - www.datart.cz · RRSIG
algorithm=13; key_tag=65189; labels=3; original_ttl=300; signature=d62fab316da9f74653f99c418b8b95748a13e81402e48b9529d674a2855bdecc296a617875b00cfc028782cf2bbdbec6cd327002a11469fbc6db97abe5e629fb; signature_expiration=1789247596; signature_inception=1788032596; signer_name=datart.cz; type_covered=A
Changes to datart.cz
No entry for this domain appears in the current public change feed. The feed is a selected sample, so this does not establish that its DNS stayed unchanged.
Start monitoring to build a history from your first check, or explore observed changes across the dataset.
SPF diagnostics
Static observations from the published SPF record. No nested include or redirect dependencies were evaluated. The actual sending IP and evaluation path are needed to assess the RFC 7208 limit of 10 DNS-dependent terms.
Modern mail security across the dataset
The required DNS labels are not queried. Adoption is unknown for this domain and for the population. Apex TXT anomalies are listed separately in the security posture report.
Reverse DNS of inbound MX hosts
These are separately dated observations of inbound MX addresses. They do not identify the actual sending IP. To assess outbound mail, check current forward and reverse DNS of the actual sending IP; FCrDNS and delivery were not measured here.
datart-cz.mail.protection.outlook.com
No current PTR conclusion. The cached observation is stale. Legacy data lacks per-address DNS result codes.
DNS attempt: 2026-07-27 11:59:42 UTC. Per-address query coverage is unavailable in this legacy observation.
| Observed IP | Observed PTR names | DNS observation |
|---|---|---|
2a01:111:f403:ca09::2 | mail-am0pr83cu00402.inbound.protection.outlook.com | PTR observed |
2a01:111:f403:ca09::5 | mail-am1pr04cu00105.inbound.protection.outlook.com | PTR observed |
2a01:111:f403:ca09::b | mail-am7pr05cu00103.inbound.protection.outlook.com | PTR observed |
2a01:111:f403:ca09::d | — | Unknown DNS result |
52.101.68.25 | — | Unknown DNS result |
52.101.68.29 | — | Unknown DNS result |
52.101.73.153 | — | Unknown DNS result |
52.101.73.30 | — | Unknown DNS result |
Observed PTR names are outside this domain. Name relationships are not a forward-confirmed reverse DNS test.
Where datart.cz stands
The same snapshot cut by zone, by list position and by how alive the published policies are.
- At this list position the top three mailbox providers hold 60.1% of domains (Google Workspace, Microsoft 365, Unknown / Other).
- Across the dataset 25.1% of DMARC records are inert — policy does nothing and no reports are collected.
Context of .cz
Most used sending platforms among 1,451 SPF-publishing domains in Czechia: Mailchimp 20.1% · Mailgun 10.1% · Amazon SES 9.0% · Mandrill 7.1%. datart.cz runs a stack that is typical for this zone.
How to interpret these observations
MX identifies the observed inbound mailbox or gateway. SPF includes identify services authorised to send for the domain. DMARC shows the published authentication policy. The dataset currently contains 3 populated signal groups for this page.
Observed deliverability context: based on the available observations, this page describes DNS configuration only. It does not represent a complete audit of datart.cz and does not prove that a particular message reaches the inbox or spam folder.
Frequently asked questions
What email provider does datart.cz use?
datart.cz uses Microsoft 365 for inbound mail (detected from its primary MX record) as of September 7, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
What ESP does datart.cz use?
datart.cz authorises Mailgun, Heureka Mailing (CZ) in its SPF record as of September 7, 2026.
Does datart.cz enforce DMARC?
Yes — datart.cz publishes p=reject, the strictest DMARC policy (as of September 7, 2026).
Related domain statistics
Nearby domains in the Tranco ranking: butterflymx.com · footlocker.com · continental.com · qoo-app.com
Browse provider data · Compare historical periods · Run an inbox placement test
Data: Email infrastructure of the Tranco top-1M, daily snapshot 2026-09-07, derived from OpenINTEL forward-DNS measurements. Cite with the date — records change daily.