What is .se?
A little context on Sweden: the capital is Stockholm, the main language is Swedish, the currency is the Swedish krona (SEK) and the international dialing code is +46.
Next door on the map, you'll find .fi for Finland and .no for Norway.
IANA lists The Internet Infrastructure Foundation as the manager of .se, with an address in Sweden. The registry's website is https://www.internetstiftelsen.se. 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 10 name servers for .se, every one of them reachable over IPv6. The delegation is DNSSEC-signed, so resolvers can verify that answers for .se haven't been tampered with on the way. Registration data is published over WHOIS (the WHOIS server is whois.iis.se).
.se FAQ
What country is .se?
.se is the country-code top-level domain for Sweden, in Northern Europe.
What is Sweden's domain extension?
Sweden's website extension is .se, its country-code top-level domain. "SE" is its ISO 3166-1 alpha-2 code.
Who owns the .se domain?
IANA lists The Internet Infrastructure Foundation as the manager of .se: it runs the registry and sets the rules for Sweden's ccTLD. Individual .se names belong to whoever registers them.
Can I register a .se domain from the US?
It depends on The Internet Infrastructure Foundation's policy. Some ccTLDs are open to anyone in the world, while others require a local address, company or trademark. Check the registry (https://www.internetstiftelsen.se) or an accredited registrar before you buy.
Is .se DNSSEC-signed?
Yes. The root zone has a DS record for .se, so DNSSEC validation works all the way down from the root.
How do I look up who owns a .se domain?
Query the registry's registration data service: the WHOIS server is whois.iis.se. Many registrants use privacy services, so personal details may be hidden.
Sources
Data from IANA root zone version 2026102000. Last changed February 12, 2026. Spotted something wrong? Tell us.
