.us WHOIS Lookup
.us is the country code extension of the United States, and Registry Services, LLC keeps its registrations. Look up a .us name here to see who holds it and when it expires.
- 1,494 extensions
- IANA 1601 ICANN accredited
- 2 protocols — RDAP and WHOIS
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.us WHOIS Lookup: Record Fields and the Nexus
.us is the country code extension of the United States and entered the root zone on 15 February 1985. It is run by Registry Services, LLC, the same company that operates .biz. WHOIS queries are answered by whois.nic.us. IANA lists no RDAP service for .us, so port 43 WHOIS is the only machine-readable route to its registration data. The zone carries DNSSEC signatures.
A .us WHOIS reply runs to sixty fields. It holds the creation, update and expiry dates, the registrar with its abuse email and phone, and the status codes. Three contact blocks follow for the registrant, the administrative contact and the technical contact, each with name, organisation, street address, phone, fax and email. Every block closes with two eligibility lines, Application Purpose and Nexus Category. For comparison, open the .biz WHOIS lookup from the same operator or the .ca WHOIS lookup for the northern neighbour.
About the .us extension
- Extension
- .us
- WHOIS server
- whois.nic.us
- RDAP endpoint
- This extension has no RDAP endpoint in the IANA bootstrap registry.
- Registry
- Registry Services, LLC
- In the root zone since
- 15 February 1985
- Eligibility fields
- Nexus Category and Application Purpose, in every contact block
- RDAP
- No endpoint registered with IANA
- 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 I see who owns a .us domain in a WHOIS lookup?
Yes, for .us names held by companies the WHOIS record shows the registrant's name, organisation, postal address, phone number and email in full. The administrative and technical blocks of such records are filled in as well, so you can write to the holder directly. Names held by private individuals may show less, because data protection is applied differently to natural persons.
What do Nexus Category and Application Purpose mean in a .us record?
These two fields record the grounds on which a .us name was registered. Nexus Category gives, as a short code, the class of connection between the holder and the United States, and Application Purpose gives the reason for the registration. Both appear in all three contact blocks. The reply carries only the codes, whose meanings are set out in the registry's own rules for .us.
How do I find out when a .us domain expires?
The expiry date of a .us domain is on the Registry Expiry Date line of the WHOIS reply, written in UTC. Close by are Creation Date, the day the name was first registered, and Updated Date, which moves forward whenever the record is edited. The whois.com.tr result screen turns these values into the domain's age and the time left before renewal.
What do the status codes in a .us WHOIS record lock?
A .us record can have deletion, transfer and updates locked by the registrar and the registry at the same time, which puts six codes in the reply. Codes starting with client are set by the registrar, and the registrar can remove them again. Codes starting with server come from the registry and stay out of the registrar's reach. The result screen explains next to each code which action it blocks.
What does DNSSEC: unsigned mean in a .us WHOIS record?
The DNSSEC line in a .us reply describes only the domain you looked up. It reads signed when a DS record has been published for that name and unsigned when none exists. Since the .us zone itself is always signed, an unsigned result simply means DNSSEC has not been set up for that particular domain and says nothing about the extension.
Can a WHOIS lookup tell me if a .us domain is available?
Yes, a lookup settles it quickly. If nobody holds the name, the .us registry reports that no match was found and none of the record fields appear, and whois.com.tr shows the name as available. Because registration under .us rests on a connection to the United States, the new record will carry your own nexus category and application purpose once you register it.