Zoner (CZ) email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Zoner (CZ) is the mailbox provider for 155 domains — 0.02% of 675,489 domains with MX records. Its strongest TLD is .cz (47.1% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What Zoner (CZ) represents in this dataset
Long-running CZ/SK hosting brand.
Directory category: Hosting. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-24 snapshot shows about Zoner (CZ)
Across 32 distinct TLDs its top three are .cz (47.1%), .com (12.9%), .sk (10.3%) — together 70.3% of the 155 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is Heureka Mailing (CZ) (ESP, 16 domains, 10.3% of them), followed by SmartEmailing (5.8%). Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-24); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with Zoner (CZ)
What else the same 155 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of Zoner (CZ) users |
|---|---|---|---|
| ESP | Heureka Mailing (CZ) | 16 | 10.3% |
| ESP | SmartEmailing | 9 | 5.8% |
| ESP | SparkPost | 4 | 2.6% |
| ESP | Mailkit | 3 | 1.9% |
| ESP | Mailgun | 3 | 1.9% |
| ESP | Mailjet (Sinch) | 2 | 1.3% |
| ESP | Amazon SES | 2 | 1.3% |
| ESP | Elastic Email | 2 | 1.3% |
| ESP | Mailchimp | 2 | 1.3% |
| ESP | Zendesk | 2 | 1.3% |
TLD distribution (top 30 of 32)
Frequently asked questions
How many domains use Zoner (CZ)?
155 domains in the Tranco top-1M use Zoner (CZ) as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is Zoner (CZ)'s market share?
Zoner (CZ) holds 0.02% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to Zoner (CZ)?
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-09-24).
Largest mailbox providers in this category
Self-Hosted (22.56%) · Google Workspace (21.58%) · Microsoft 365 (17.03%) · Unknown / Other (6.68%) · Generic / unmatched (mx*.*) (2.53%) · Generic / unmatched (mail.*) (1.93%) · Proofpoint (1.86%) · Cloudflare Email Routing (1.76%) · Yandex 360 (1.67%) · Mimecast (1.47%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 155 domains.