What is .th?
A little context on Thailand: the capital is Bangkok, the main language is Thai, the currency is the Thai baht (THB) and the international dialing code is +66.
Next door on the map, you'll find .mm for Myanmar, .kh for Cambodia, .la for Laos and .my for Malaysia.
IANA lists Thai Network Information Center Foundation as the manager of .th, with an address in Thailand. The registry's website is http://www.thnic.co.th. ccTLD managers set their own policies — who can register, which second-level names exist, pricing to registrars — so those rules differ from country to country.
Under the hood, the root zone points to 6 name servers for .th, 5 of them reachable over IPv6. The delegation is DNSSEC-signed, so resolvers can verify that answers for .th haven't been tampered with on the way. Registration data is published over RDAP and WHOIS (the WHOIS server is whois.thnic.co.th).
Thailand also has another country-code domain in the root zone: .ไทย (Thai).
Same registry, other endings
1 other TLD shares this operator.
.th FAQ
What country is .th?
.th is the country-code top-level domain for Thailand, in South-Eastern Asia.
What is Thailand's domain extension?
Thailand's website extension is .th, its country-code top-level domain. It also has .ไทย in other scripts. "TH" is its ISO 3166-1 alpha-2 code.
Who owns the .th domain?
IANA lists Thai Network Information Center Foundation as the manager of .th: it runs the registry and sets the rules for Thailand's ccTLD. Individual .th names belong to whoever registers them.
Can I register a .th domain from the US?
It depends on Thai Network Information Center Foundation's policy. Some ccTLDs are open to anyone in the world, while others require a local address, company or trademark. Check the registry (http://www.thnic.co.th) or an accredited registrar before you buy.
Is .th DNSSEC-signed?
Yes. The root zone has a DS record for .th, so DNSSEC validation works all the way down from the root.
How do I look up who owns a .th domain?
Query the registry's registration data service: the WHOIS server is whois.thnic.co.th, and RDAP lookups go to https://rdap.thains.co.th/. Many registrants use privacy services, so personal details may be hidden.
Sources
Data from IANA root zone version 2026102000. Last changed January 23, 2025. Spotted something wrong? Tell us.
