Defaults.Exposed › By TLD › .uk
Is .uk safe? The state of .uk domain security — United Kingdom
.uk is safer than the internet average. Across 8,313,526 graded .uk domains, 70.3% score an F — cleaner than the 78.3% global average — better company than most of the web. 2.4% earn a B or better. Most .uk domains can still be impersonated in email, but the ending shifts the odds, not your own domain's grade. As of 2026-08-16.
In the .uk zone — covering United Kingdom — 66.2% of 6,462,996 graded domains earn an F, well below the 73.8% internet-wide average. DMARC enforcement here stands at 14.8% — above the 11.8% census-wide rate.
Note: .uk is used as a proxy for United Kingdom based on the domain's TLD, not where the company is registered.
How do .uk domains score?
Aggregate grade distribution across all graded .uk domains — we never publish an individual business's grade. As of 2026-08-16.
| Grade | Domains | Share |
|---|---|---|
| A+ | 1,765 | 0% |
| A | 10,011 | 0.1% |
| B | 188,230 | 2.3% |
| C | 767,390 | 9.2% |
| D | 1,503,962 | 18.1% |
| F | 5,842,168 | 70.3% |
Does .uk 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 .uk doesn't protect you, and a high-F-share ending doesn't doom you: a correctly configured .uk domain earns an A while the crowd around it sits at F.
Want to know where your .uk 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 .uk safe?
On average, .uk is safer than the internet average: 70.3% of its 8,313,526 graded domains score an F as of 2026-08-16, against a 78.3% global average. Most domains on every ending are exposed — the ending shifts the odds, not your own domain's grade.
How secure are .uk domains?
29.7% of .uk domains score above an F and 2.4% 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 .uk 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 .uk too.
What does "grade F" mean for a .uk 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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