.co WHOIS Lookup
.co is Colombia's country code extension, and its names are registered all over the world. Look up a .co domain to find its registrar, its status and the date its current term ends.
- 1,494 extensions
- IANA 1601 ICANN accredited
- 2 protocols — RDAP and WHOIS
Your IP address
.co WHOIS Lookup: Record Fields and Contact Lines
.co was delegated to the root zone on 24 December 1991 as the country code of Colombia, and the DNSSEC-signed zone lists the Ministry of Information and Communications Technologies (MinTIC) as its registry. WHOIS queries are answered on port 43 by whois.registry.co. A reply carries the creation, update and expiry dates, the registrar's name and IANA number, the name servers, EPP status codes and the registrar's abuse email and phone.
Four contact email fields appear in every .co reply, for the registrant, admin, tech and billing roles, and all four hold the same sentence asking you to query the RDDS service of the registrar of record. Software that reads WHOIS automatically can mistake that sentence for an address. Many registries dropped the billing role years ago, yet .co still lists it. The .io WHOIS lookup shows a similar layout under another country code, and the .com WHOIS lookup its generic counterpart.
About the .co extension
- Extension
- .co
- WHOIS server
- whois.registry.co
- RDAP endpoint
- This extension has no RDAP endpoint in the IANA bootstrap registry.
- Registry
- Ministry of Information and Communications Technologies (MinTIC), Colombia
- Delegated
- 24 December 1991
- Not published
- Registrant name, postal address and phone
- Contact email fields
- Referral to the registrar of record
- 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
Can a .co WHOIS lookup tell me who owns the domain?
No, the .co registry publishes no owner name, postal address or phone, and the contact email fields hold only a referral to the registrar. The Registrar line names the company that manages the domain, and Registrar WHOIS Server points to its own lookup service. Owner details are requested there, and the registrar decides on the request under its rules and data protection law.
How do I see when a .co domain expires?
A .co domain's current term ends on the date shown in the Registry Expiry Date line, written in UTC. Next to it, Creation Date gives the first registration and Updated Date the most recent edit of the record. whois.com.tr converts these values into the age of the domain and the days remaining in its term; google.co, for instance, was registered in 2010 and runs until 2027.
What does clientTransferProhibited mean on a .co domain?
clientTransferProhibited means the registrar has locked the .co domain against a move to another registrar. Because the code starts with client, the registrar that set it can remove it when the holder asks. google.co carries three such codes, for delete, transfer and update, and no server code. Server codes are placed by the registry and stay out of the registrar's reach.
Is there an RDAP service for .co domains?
IANA's RDAP bootstrap file has no entry for .co, so RDAP clients that locate servers through that file get no answer for .co names. The notice at the end of each WHOIS reply still refers to WHOIS and RDAP services provided by CentralNic. Until .co appears in the bootstrap file, port 43 WHOIS at whois.registry.co remains the dependable source of .co registration data.
Is there a limit on how many .co WHOIS queries I can make?
Yes, access to the .co WHOIS service is rate limited, and the notice in every reply says so. The same terms forbid high-volume automated collection and any storing or reproduction of the data, and the registry warns that violators are permanently blacklisted. A single lookup is unaffected; the limit is aimed at scripts that send many queries in a row.
How does an available .co domain look in a WHOIS lookup?
An available .co domain gets a no-match answer from whois.registry.co, with no dates, registrar or status lines. whois.com.tr flags such a .co name as available. A .co name that shows status codes and an expiry date is registered, even though its contact fields reveal nothing about the holder.