What is .cu?
A little context on Cuba: the capital is Havana, the main language is Spanish, the currency is the Cuban convertible peso (CUC) and the international dialing code is +53.
IANA lists CENIAInternet as the manager of .cu, with an address in Cuba. The registry's website is http://www.nic.cu. ccTLD managers set their own policies — who can register, which second-level names exist, pricing to registrars — so those rules differ from country to country.
Under the hood, the root zone points to 6 name servers for .cu, 4 of them reachable over IPv6. There is no DS record for .cu in the root zone, which means the TLD is not DNSSEC-signed at the top level.
.cu FAQ
What country is .cu?
.cu is the country-code top-level domain for Cuba, in Caribbean.
What is Cuba's domain extension?
Cuba's website extension is .cu, its country-code top-level domain. "CU" is its ISO 3166-1 alpha-2 code.
Who owns the .cu domain?
IANA lists CENIAInternet as the manager of .cu: it runs the registry and sets the rules for Cuba's ccTLD. Individual .cu names belong to whoever registers them.
Can I register a .cu domain from the US?
It depends on CENIAInternet's policy. Some ccTLDs are open to anyone in the world, while others require a local address, company or trademark. Check the registry (http://www.nic.cu) or an accredited registrar before you buy.
Is .cu DNSSEC-signed?
No. As of our last data refresh there is no DS record for .cu in the root zone.
Sources
Data from IANA root zone version 2026102000. Last changed May 14, 2026. Spotted something wrong? Tell us.
