Defaults.Exposed › By TLD › .nu
Is .nu safe? The state of .nu domain security
.nu is safer than the internet average. Across 112,676 graded .nu domains, 54.3% score an F — cleaner than the 73.8% global average — better company than most of the web. 4.1% earn a B or better. Most .nu 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 .nu domains score?
Aggregate grade distribution across all graded .nu domains — we never publish an individual business's grade. As of 2026-07-29.
| Grade | Domains | Share |
|---|---|---|
| A+ | 78 | 0.1% |
| A | 333 | 0.3% |
| B | 4,235 | 3.8% |
| C | 17,335 | 15.4% |
| D | 29,498 | 26.2% |
| F | 61,197 | 54.3% |
Does .nu 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 .nu doesn't protect you, and a high-F-share ending doesn't doom you: a correctly configured .nu domain earns an A while the crowd around it sits at F.
Want to know where your .nu 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 .nu safe?
On average, .nu is safer than the internet average: 54.3% of its 112,676 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 .nu domains?
45.7% of .nu domains score above an F and 4.1% 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 .nu 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 .nu too.
What does "grade F" mean for a .nu 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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