What is .bio?
ICANN's records put the delegation of .bio on June 2, 2014. Like most of the newer endings, it was applied for in the 2012 New gTLD Program round and its registry agreement was signed on March 6, 2014.
Identity Digital Domains Limited also runs 23 other TLDs, including .archi, .bet, .black, .blue and .global.
Under the hood, the root zone points to 4 name servers for .bio, every one of them reachable over IPv6. The delegation is DNSSEC-signed, so resolvers can verify that answers for .bio haven't been tampered with on the way. Registration data is published over RDAP.
Same registry, other endings
23 other TLDs share this operator.
.bio FAQ
What does .bio mean?
.bio is a generic top-level domain named for the word "bio". It doesn't belong to any country.
What country is .bio?
None. .bio is a generic top-level domain, so it isn't tied to any country.
Who owns the .bio domain extension?
Identity Digital Domains Limited operates .bio as its registry, under a registry agreement with ICANN.
When was .bio created?
.bio was delegated to the DNS root zone on June 2, 2014.
Is .bio a valid domain?
Yes. .bio is an active top-level domain in the DNS root zone, delegated in 2014, so .bio addresses work in every browser.
Can I buy a .bio domain?
.bio names are sold through ICANN-accredited registrars. Some gTLDs restrict who can register, so read Identity Digital Domains Limited's policy if you're unsure.
Is .bio DNSSEC-signed?
Yes, the root zone holds a DS record for .bio.
Sources
Data from IANA root zone version 2026102000. Last changed October 13, 2026. Spotted something wrong? Tell us.
