The complete guide to .si domains
What .si domains are, who can register them, how .si domain hacks work and what makes a .si name valuable.
What is .si?
.si is the country-code top-level domain of Slovenia, run by Register.si. It is used by Slovenian businesses and, increasingly, by brands worldwide because of how the two letters read.
Who can register a .si domain?
Registration is open to individuals and organisations from any country through an accredited registrar, so you do not need to live in Slovenia or have a local company.
Domain hacks with .si
Many English words end in “-si” or the sound of it, so the extension can complete the word: think names such as Pepti.si or Systemics.si. “Sí” also means “yes” in Spanish and Italian, which gives .si a positive feel for some brands.
What makes a .si name valuable
Short names (three or four letters), real words that read naturally with the ending, and names that are taken in .com and other extensions all tend to be in higher demand. Because .si is less crowded than .com, good names are still possible to find.
Checking availability
Register.si offers a public RDAP service, so Estimated can check .si names directly with the registry. Very short or very common names can be reserved, so always confirm at checkout.
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