Defaults.Exposed › By TLD › .koeln
Is .koeln safe? The state of .koeln domain security
.koeln is riskier than the internet average. Across 15,769 graded .koeln domains, 84.1% score an F — worse than the 78.3% global average — heavier on exposed domains than the web as a whole. 0.7% earn a B or better. Most .koeln domains can still be impersonated in email, but the ending shifts the odds, not your own domain's grade. As of 2026-08-16.
Of 15,006 graded .koeln domains, 79.8% earn an F — well above the 73.8% internet-wide average. DMARC enforcement here stands at 19.2% — above the 11.8% census-wide rate.
How do .koeln domains score?
Aggregate grade distribution across all graded .koeln domains — we never publish an individual business's grade. As of 2026-08-16.
| Grade | Domains | Share |
|---|---|---|
| A+ | 2 | 0% |
| A | 14 | 0.1% |
| B | 93 | 0.6% |
| C | 582 | 3.7% |
| D | 1,820 | 11.5% |
| F | 13,258 | 84.1% |
Does .koeln 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 .koeln doesn't protect you, and a high-F-share ending doesn't doom you: a correctly configured .koeln domain earns an A while the crowd around it sits at F.
Want to know where your .koeln 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 .koeln safe?
On average, .koeln is riskier than the internet average: 84.1% of its 15,769 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 .koeln domains?
15.9% of .koeln domains score above an F and 0.7% 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 .koeln 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 .koeln too.
What does "grade F" mean for a .koeln 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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