Open WHOISbuilt by Just

.io WHOIS lookup

.io is managed by Internet Computer Bureau Limited. Its registry has no RDAP service yet, so a lookup here shows the domain's DNS setup, and full details come from its WHOIS server, whois.nic.io, or the registry's website.

Managed by

Internet Computer Bureau Limited

As listed by IANA

RDAP

None yet

Lookups show DNS only

WHOIS server

whois.nic.io

DNSSEC

Signed

The ending is signed in the root zone

In the root zone since

16 September 1997

Registry website

www.nic.io

What a .io lookup shows

The nameservers and the mail setup read from DNS. Registration details need the registry's own lookup until it offers RDAP.

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Ending: .io
Managed by: Internet Computer Bureau Limited
RDAP base URL: none
WHOIS server: whois.nic.io
DNSSEC signed in the root: yes
Source: IANA root zone database and RDAP bootstrap, read 2026-10-31
Lookup URL: https://openwhois.org/#d=example.io