TopDNS mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), TopDNS is the mailbox provider for 33 domains — 0.01% of 665,310 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 33 domains in the Tranco top-1M use TopDNS (0.01% of domains with MX records).
- Snapshot date: 2026-09-12 — recomputed every day.
- Strongest TLD: .com (81.8% of its domains).
- Region skew: Global / US-skewed.
- Most co-used service: Zendesk.
- Directory category: hosting mail bundle.
Why TopDNS appears in this category
White-label DNS+mail (Internet Domain Service BS).
We classify it as a hosting mail bundle from primary MX record (lowest preference) matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
TopDNS is a managed DNS and email infrastructure service that handles MX record routing for websites. It allows smaller businesses to manage email delivery without operating their own mail servers.
TopDNS's footprint among major websites is concentrated among smaller sites in the .com space. Its frequent pairing with customer service platforms like Zendesk means that senders targeting niche markets may encounter TopDNS inboxes more often than overall statistics suggest, warranting specific testing consideration in vertical-specific campaigns.
Where TopDNS sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 1 | 3.0% |
| Top 100,000 | 2 | 6.1% |
| Top 1,000,000 | 29 | 87.9% |
| Unranked | 1 | 3.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 27 | 81.8% | |
| .org | 2 | 6.1% | |
| .app | 1 | 3.0% | |
| .tf | 1 | 3.0% | |
| .pm | 1 | 3.0% | |
| .eu | 1 | 3.0% |
What TopDNS users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 33 domains.
| Type | Service | Domains | Share of TopDNS users |
|---|---|---|---|
| ESP | Zendesk | 1 | 3.0% |
TopDNS in customer-service business segments
TopDNS is commonly deployed alongside Zendesk and similar customer service platforms, indicating its adoption among smaller, service-oriented businesses. This concentration means that campaigns targeting these sectors will likely interact with TopDNS-routed inboxes at higher rates than the provider's overall market share would suggest.
See the full TopDNS data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Is TopDNS a major mailbox provider I need to test against?
TopDNS is a managed email infrastructure service used primarily by smaller businesses, particularly those running customer service platforms. While not a top-tier provider by overall volume, its concentration in specific business verticals and the .com space makes it worth testing if your campaigns target those markets.
How many domains use TopDNS?
33 domains in the Tranco top-1M use TopDNS as their mailbox provider as of September 12, 2026 (0.01% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is TopDNS common enough to affect email deliverability testing?
TopDNS accounts for 0.01% of domains with MX records in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
Which countries or TLDs use TopDNS most?
TopDNS's largest TLD is .com (81.8% of its domains); it appears across 6 TLDs in total.