What is .citadel?
Brand TLDs operate under Specification 13 of ICANN's registry agreement. It lets a trademark owner keep every second-level name for itself, so you won't find .citadel names for sale at any registrar.
ICANN's records put the delegation of .citadel on July 23, 2016. Like most of the newer endings, it was applied for in the 2012 New gTLD Program round and its registry agreement was signed on July 23, 2015.
Under the hood, the root zone points to 4 name servers for .citadel, every one of them reachable over IPv6. The delegation is DNSSEC-signed, so resolvers can verify that answers for .citadel haven't been tampered with on the way. Registration data is published over RDAP and WHOIS (the WHOIS server is whois.nic.citadel).
.citadel FAQ
What country is .citadel?
None. .citadel is a generic top-level domain, so it isn't tied to any country.
Who owns the .citadel domain extension?
Citadel Domain LLC operates .citadel as its registry, under a registry agreement with ICANN.
When was .citadel created?
.citadel was delegated to the DNS root zone on July 23, 2016.
Is .citadel a valid domain?
Yes. .citadel is an active top-level domain in the DNS root zone, delegated in 2016, so .citadel addresses work in every browser.
Can I buy a .citadel domain?
No. .citadel is a brand TLD under ICANN Specification 13, so names are reserved for Citadel Domain LLC.
Is .citadel DNSSEC-signed?
Yes, the root zone holds a DS record for .citadel.
Sources
Data from IANA root zone version 2026102000. Last changed October 14, 2026. Spotted something wrong? Tell us.
