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Use the official Register.si domain lookup to check a .si name. If it appears unregistered, verify that it is not reserved and meets the registry’s naming rules, then confirm its status and submit a registration through an authorised registrar. A lookup is only a point-in-time check; it does not reserve the name.
Check the name in Register.si
- Open the Register.si website and enter the complete domain, including the
.siending, in the domain lookup. - Review the result for the exact name you entered. If it appears unregistered, continue by checking the eligibility rules; an unused name may still be unavailable for registration.
- Before paying, confirm the name and its current status with an authorised registrar. The Slovenian government’s SPOT guidance says .si domains can be registered through any authorised registrar.
- Submit the registration application through that registrar. The registry’s general terms say complete applications are processed automatically on a first-come basis. Registration follows when the conditions are met and the registry receives payment from the registrar.
Check that the name meets .si rules
Register.si’s registration guidance and general terms set out the naming requirements. A .si name must contain 2 to 63 characters. It cannot begin or end with a hyphen, and ordinary names cannot have two consecutive hyphens in the third and fourth positions.
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Allowed characters include Latin letters, digits, hyphens and the listed characters used for internationalised domain names. The registry’s terms give 112.si, 113.si, si.si and rs.si as examples of reserved names. Check the registry’s current reserved-name information rather than treating those examples as a complete list.
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Understand what an availability result tells you
A lookup reports status at the time it is made; it is not a reservation or a guarantee that a registration will be accepted. Because eligible applications are processed first-come, another applicant may register the name while you are deciding. The registrar’s confirmation and application are the practical next steps if you want to pursue it.
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IANA lists ARNES as the manager of the .si country-code domain and identifies https://rdap.register.si/ as its RDAP service and whois.register.si as its WHOIS server. Register.si’s own lookup is the straightforward place to start; use the authorised registrar to confirm current status before payment.
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