Defaults.Exposed › By TLD › .su
Is .su safe? The state of .su domain security
.su is safer than the internet average. Across 56,253 graded .su domains, 64.6% score an F — cleaner than the 73.8% global average — better company than most of the web. 1.2% earn a B or better. Most .su domains can still be impersonated in email, but the ending shifts the odds, not your own domain's grade. As of 2026-07-29.
How do .su domains score?
Aggregate grade distribution across all graded .su domains — we never publish an individual business's grade. As of 2026-07-29.
| Grade | Domains | Share |
|---|---|---|
| A+ | 17 | 0% |
| A | 38 | 0.1% |
| B | 607 | 1.1% |
| C | 4,620 | 8.2% |
| D | 14,627 | 26% |
| F | 36,344 | 64.6% |
Does .su make a domain secure?
No — and that's the most important thing to know. A domain's grade is decided by how it is configured (SPF, DMARC, HTTPS, DNS), not by its ending. Choosing .su doesn't protect you, and a high-F-share ending doesn't doom you: a correctly configured .su domain earns an A while the crowd around it sits at F.
Want to know where your .su domain ranks? Check it privately and free — we only ever show an individual domain's grade to its verified owner. Run the free check →
Frequently asked questions
Is .su safe?
On average, .su is safer than the internet average: 64.6% of its 56,253 graded domains score an F as of 2026-07-29, against a 73.8% global average. Most domains on every ending are exposed — the ending shifts the odds, not your own domain's grade.
How secure are .su domains?
35.4% of .su domains score above an F and 1.2% earn a B or better. The rest fail the basic externally observable protections, most importantly enforced SPF and DMARC, so they can be impersonated in email.
Does choosing .su make my domain secure?
No. A domain's grade comes from how it is configured — SPF, DMARC, HTTPS, DNS — not from its ending. A well-configured domain earns an A on any ending; an unconfigured one sits at F on .su too.
What does "grade F" mean for a .su domain?
It fails the basic protections we can observe from outside — above all, it has no enforced SPF and DMARC, so its email can be forged and its customers targeted with convincing fakes.
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