.si Domain Prices — Compare 30 Registrars

.si is Slovenia's country-code domain. It was added to the root zone on 1 April 1992, shortly after Slovenia became independent from Yugoslavia. The letters come from Slovenija.

ARNES, the Academic and Research Network of Slovenia, manages .si. ARNES is a public institution in Ljubljana that also runs Slovenia's network for universities, schools and research centres. It operates the registry, writes the rules and accredits the registrars who sell names. You register through one of those registrars.

.si domain names are open to all applicants. Slovenian citizenship, residence, or a local company are not required, allowing international individuals and businesses to register directly.

Registrants must provide accurate information and comply with all applicable laws. The registry may refuse or remove names that violate its rules, and third-party rights, including trademarks, remain protected.

.si domains support Slovenian characters such as č, š, and ž, allowing names to be registered as they are written in Slovenian. It is recommended to also register the non-accented version, as some users may omit accents when typing.

WHOIS privacy works differently for individuals and organisations. For individual registrants, only the email address appears in the public WHOIS. For organisations, full registration details are displayed.

In September 2026 .si acquired a new meaning when the US government decided to use "SI" to denote "super intelligence" rather than "AI". Because of this, a number of technology companies and investors started to register .si domains, just as had happened earlier with .ai.

However, this increased interest has no impact on the status of the domain: .si is still Slovenia's country code and is managed by ARNES with the same open registration rules.

There have been instances where domains were bought with a view to reselling them, so if the .si name you want is available on the resale market, it is advisable to compare its price to the standard registration fee before deciding to purchase it.

.si is used by Slovenian businesses, government entities, schools, tourism organisations, and individuals. International companies use it for Slovenian-language websites. Some also choose .si for creative wordplay, since "sí" means "yes" in Spanish and Italian.

Sources: Register.si general terms · Netcraft on the 2026 .si registration surge