.io WHOIS Lookup
.io is a country code extension widely used by technology companies. Enter a .io name to see when it was registered, when it expires and which registrar manages it.
- 1,494 extensions
- IANA 1601 ICANN accredited
- 2 protocols — RDAP and WHOIS
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.io WHOIS Lookup: Record Fields and Closed Values
.io is the country code extension of the British Indian Ocean Territory. Delegated on 16 September 1997 and signed with DNSSEC, the zone is run by the registry Internet Computer Bureau Limited, and WHOIS queries go to whois.nic.io on port 43. Although .io is a country code, its reply copies the layout of generic extensions such as .com. The 54 labelled fields include the registrar's IANA number, an abuse email and phone line, and EPP status codes linked to ICANN's definitions.
Creation, update and expiry dates are published in full, and so are the registrar's name, website and WHOIS server. The registrant, admin and tech blocks keep every label, yet almost all of their values read REDACTED. For comparison, the .co WHOIS lookup shows another country code with a gTLD-style reply, and the .me WHOIS lookup covers an extension often chosen for personal sites.
About the .io extension
- Extension
- .io
- WHOIS server
- whois.nic.io
- RDAP endpoint
- This extension has no RDAP endpoint in the IANA bootstrap registry.
- Registry
- Internet Computer Bureau Limited
- Delegated
- 16 September 1997
- Reply format
- 54 fields in the generic (gTLD) layout
- Readable contact lines
- Registrant organisation, state and country
- Last checked
- 12 August 2026
Looking for whether a name is still free, rather than who holds it? run a domain name search
WHOIS FAQ
Does a .io WHOIS lookup show who owns the domain?
A .io WHOIS record can name the organisation that owns the domain, but it gives no personal contact details. In the registrant block only the organisation, the state or province and the country are readable. A company behind a .io name is therefore often identifiable from the record, while a private holder stays anonymous. The admin and tech blocks are redacted in full.
How can I contact the owner of a .io domain?
You reach the owner of a .io domain through its registrar, because the registry does not release the REDACTED values. The registrar decides on requests for contact data under its own rules and the data protection law that applies to it. To report phishing, spam or malware on a .io site, write to the abuse email address or call the abuse phone number given in the WHOIS reply.
How do I check when a .io domain expires?
The expiry date of a .io domain is on the Registry Expiry Date line, given in UTC down to the second. Creation Date records the day the name was first registered, and Updated Date the latest change to the record. The whois.com.tr result screen turns these values into the domain's age and a count of the days left before expiry.
What do client and server status codes mean on a .io domain?
Both kinds of status code lock an action on the .io domain, and the prefix shows who placed the lock. A client code comes from the registrar, which removes it when the holder asks. A server code comes from the registry, and the registrar has no way to lift it. A tightly protected name such as google.io carries both kinds for delete, transfer and update, six codes in total.
Can I look up a .io domain over RDAP?
No, IANA's RDAP bootstrap file lists no service for .io, so its registration data is available only from the port 43 WHOIS server. ICANN made RDAP the authoritative source for generic extensions, and country codes such as .io fall outside that rule even when their reply resembles a gTLD record. An RDAP-only client finds nothing for a .io name and needs a WHOIS fallback.
What does a .io WHOIS lookup show for an unregistered name?
For an unregistered .io name, whois.nic.io answers that no match was found and returns none of the record fields. whois.com.tr then lists the .io name as open for registration. Once a registrar completes a registration, the same lookup returns the full record, starting with the creation and expiry dates.