What is .sg?
A little context on Singapore: the capital is Singapore, languages include English, Malay and Tamil, the currency is the Singapore dollar (SGD) and the international dialing code is +65.
IANA lists Singapore Network Information Centre (SGNIC) Pte Ltd as the manager of .sg, with an address in Singapore. The registry's website is http://www.sgnic.sg. 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 5 name servers for .sg, every one of them reachable over IPv6. The delegation is DNSSEC-signed, so resolvers can verify that answers for .sg haven't been tampered with on the way. Registration data is published over RDAP and WHOIS (the WHOIS server is whois.sgnic.sg).
Singapore also has other country-code domains in the root zone: .சிங்கப்பூர் (Tamil) and .新加坡 (Han).
Same registry, other endings
2 other TLDs share this operator.
.sg FAQ
What country is .sg?
.sg is the country-code top-level domain for Singapore, in South-Eastern Asia.
What is Singapore's domain extension?
Singapore's website extension is .sg, its country-code top-level domain. It also has .சிங்கப்பூர் and .新加坡 in other scripts. "SG" is its ISO 3166-1 alpha-2 code.
Who owns the .sg domain?
IANA lists Singapore Network Information Centre (SGNIC) Pte Ltd as the manager of .sg: it runs the registry and sets the rules for Singapore's ccTLD. Individual .sg names belong to whoever registers them.
Can I register a .sg domain from the US?
It depends on Singapore Network Information Centre (SGNIC) Pte Ltd'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.sgnic.sg) or an accredited registrar before you buy.
Is .sg DNSSEC-signed?
Yes. The root zone has a DS record for .sg, so DNSSEC validation works all the way down from the root.
How do I look up who owns a .sg domain?
Query the registry's registration data service: the WHOIS server is whois.sgnic.sg, and RDAP lookups go to https://rdap.sgnic.sg/rdap/. Many registrants use privacy services, so personal details may be hidden.
Sources
Data from IANA root zone version 2026102000. Last changed February 4, 2026. Spotted something wrong? Tell us.
