The .si extension is the country code top-level domain for Slovenia, and is administered by Register.si, which is operated by Arnes (Academic and Research Network of Slovenia). The first .si domain names were registered in 1992.

The popularity of .si domain names has grown steadily over the years, particularly amongst businesses and individuals based in Slovenia.

.si domain prices

Extension	Registration	Transfer	Renewal
.si	€15.60	Free	€15.60

Prices are quoted for one year and do not include VAT. The free transfer does not include a renewal; the fee for the paid transfer usually includes a one-year renewal.

.si, as in Super Intelligence

The letters ‘SI’ do not necessarily refer only to Slovenia: in the world of artificial intelligence, they are also used as an abbreviation for ‘Super Intelligence’. By superintelligence, we mean a form of artificial intelligence – as yet theoretical – that would surpass the capabilities of human thought in virtually every field, from scientific problem-solving to creative work. Just like the .ai or .io extensions, the .si extension can also be used effectively as a so-called ‘domain hack’: it is short, easy to remember, and, as part of the name, can indicate that the website deals with artificial intelligence, research or development. If you’re launching an AI-based product, a research project or a technology blog, a .si domain name could be an imaginative and meaningful choice.

How long will it take to be ready?

New domain registration

The registration of .si domains is an automated process, so registration is virtually instantaneous; you can start using your new domain name within a few minutes of placing your order.

Domain transfer

To transfer your existing .si domain name to us, you will need to disable transfer protection with your current registrar and obtain the authorisation (Auth) code for the domain. The transfer process usually takes a few days.

How many characters can it be?

The domain name extension in .si must be at least 3 and no more than 63 characters long.

Special characters

The .si domain extension supports the following special characters, corresponding to the accented letters of the Slovenian language:

č š ž

Restrictions

Anyone can register a .si domain name, regardless of nationality or place of business, and without any particular restrictions.

Whois privacy

In the case of private individuals, personal data is not, as a rule, displayed publicly in the WHOIS database; the registration details of organisations are typically publicly available.