What is .koeln?
.koeln entered the DNS root zone on March 5, 2014, 12 years ago. It came out of ICANN's New gTLD Program, the 2012 application round that grew the root from 22 generic TLDs to well over a thousand.
domainworx Service & Management GmbH also runs 2 other TLDs, including .cologne and .wien.
On the technical side, .koeln is served by 3 authoritative name servers, every one of them reachable over IPv6. It is also DNSSEC-signed: the root zone carries a DS record for .koeln, which lets validating resolvers check its answers cryptographically. Registration data is published over RDAP and WHOIS (the WHOIS server is whois.ryce-rsp.com).
Same registry, other endings
2 other TLDs share this operator.
.koeln FAQ
What does .koeln mean?
.koeln is a generic top-level domain named for the word "koeln", and it's aimed at cities & regions. It doesn't belong to any country.
What is .koeln used for?
.koeln is mostly used for cities & regions. Like most gTLDs, it's a label of intent rather than a guarantee — check the site, not just the ending.
What country is .koeln?
None. .koeln is a generic top-level domain, so it isn't tied to any country.
Who owns the .koeln domain extension?
domainworx Service & Management GmbH operates .koeln as its registry, under a registry agreement with ICANN.
When was .koeln created?
.koeln was delegated to the DNS root zone on March 5, 2014.
Is .koeln a valid domain?
Yes. .koeln is an active top-level domain in the DNS root zone, delegated in 2014, so .koeln addresses work in every browser.
Can I buy a .koeln domain?
.koeln names are sold through ICANN-accredited registrars. Some gTLDs restrict who can register, so read domainworx Service & Management GmbH's policy if you're unsure.
Is .koeln DNSSEC-signed?
Yes, the root zone holds a DS record for .koeln.
Sources
Data from IANA root zone version 2026102000. Last changed October 19, 2026. Spotted something wrong? Tell us.
