What is .sd?
A little context on Sudan: the capital is Khartoum, languages include Arabic and English, the currency is the Sudanese pound (SDG) and the international dialing code is +249.
Sudan shares land borders with 7 countries, so the ccTLDs next door are .cf (Central African Republic), .td (Chad), .eg (Egypt), .er (Eritrea), .et (Ethiopia), .ly (Libya) and .ss (South Sudan).
IANA lists Sudan Internet Society as the manager of .sd, with an address in Sudan. The registry's website is http://www.isoc.sd. 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.
On the technical side, .sd is served by 7 authoritative name servers, 3 of them reachable over IPv6. There is no DS record for .sd in the root zone, which means the TLD is not DNSSEC-signed at the top level. Registration data is published over RDAP and WHOIS (the WHOIS server is whois.nic.sd).
Sudan also has another country-code domain in the root zone: .سودان (Arabic).
Same registry, other endings
1 other TLD shares this operator.
.sd FAQ
What country is .sd?
.sd is the country-code top-level domain for Sudan, in Northern Africa.
What is Sudan's domain extension?
Sudan's website extension is .sd, its country-code top-level domain. It also has .سودان in other scripts. "SD" is its ISO 3166-1 alpha-2 code.
Who owns the .sd domain?
IANA lists Sudan Internet Society as the manager of .sd: it runs the registry and sets the rules for Sudan's ccTLD. Individual .sd names belong to whoever registers them.
Can I register a .sd domain from the US?
It depends on Sudan Internet Society'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.isoc.sd) or an accredited registrar before you buy.
Is .sd DNSSEC-signed?
No. As of our last data refresh there is no DS record for .sd in the root zone.
How do I look up who owns a .sd domain?
Query the registry's registration data service: the WHOIS server is whois.nic.sd, and RDAP lookups go to https://rdap.nic.sd/. Many registrants use privacy services, so personal details may be hidden.
Sources
Data from IANA root zone version 2026102000. Last changed August 5, 2026. Spotted something wrong? Tell us.
