.si Domain: Slovenia's Official Country Code Extension
.si is the country code top-level domain of Slovenia and entered the root zone on 1 April 1992. The registry is not a company but ARNES, the Academic and Research Network of Slovenia, which holds the legal status of a public infrastructure institution; its domain arm operates from Ljubljana under the name Register.si. One document carries all the rules: the General terms and conditions for registration under .si, published on 15 November 2024 and in force from the same day. The registry sells nothing directly — you register through an accredited registrar.
On eligibility .si keeps the door open to everyone: any natural or legal person may register, with no requirement to be established in Slovenia and no local address, agent or paperwork. The procedure is fully automated and runs first come, first served; incomplete applications never even enter the queue. The term is freely chosen between one and five years, extended by renewal, and five years is the ceiling. Neither a change of registrar nor a change of holder shortens the term. The namespace is flat: there is no official category such as com.si, and names are registered directly at the second level.
Three details bear on your order. The first is length: the rules start the minimum at two characters, so a two-letter .si name is possible. The second is spelling — the Slovenian letters č, š and ž have been registrable since 2010, and the minimum length applies to the name you see rather than to its punycode form. The third is what follows expiry: a name that is not renewed goes into quarantine the same day, your site and mail stop at that moment, and you have thirty days to get it back. Check whether your name is free on the domain name search page.
.SI Domain at a Glance
- Registry authority ARNES — Academic and Research Network of Slovenia, a public infrastructure institution
- Registry unit Register.si, Ljubljana
- Entered the root zone 1 April 1992
- Registered .si names 189,426 — registry's live counter, 16 August 2026
- Window after expiry 30 days of quarantine, then the name is deleted
- Rules in force General terms and conditions, 15 November 2024
- Document Requirement There are no requirements for buying .si domain registration
- Country Slovenia
- Character Length 3 - 63 characters
- Registration Period 1 - 10 years
- Name Server Count 2 - 10 servers
.si Domain Prices — No Surprise Fees
Registration, transfer and renewal fees are listed separately. The renewal price can differ from the first-year price, so you see both up front.
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New Registration
$48.99 / years -
Transfer
$0.00 / years -
Renewal
$53.99 / years -
Restore
$99.65 -
Late Renewal
$9.80
Included With Every .si Domain
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Free DNS management
Change A, MX, TXT and CNAME records yourself from the panel — no waiting on anyone when you move a site or mailbox.
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Domain lock
While the lock is on, nobody can move your domain to another registrar without your approval.
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Domain forwarding
Point the domain at your existing site, a campaign page or a social profile — at no extra cost.
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Free WHOIS privacy
Your name, address and phone stay out of public WHOIS records, which cuts down spam and scam calls.
.si Domain Lifecycle
Domain lifecycle
The stages in order, from registration to releaseDomain Is Available (Available)
A .si address at this stage has not been taken yet, and it goes to whoever registers first. Check the name you have in mind — if it is free, it can be yours within minutes.
Domain Is Active (Active Period)
Once registration is complete the domain is yours for the term you chose. You can renew at any point before expiry to keep it uninterrupted, or switch on auto-renewal so you never have to watch the date.
Redemption Period (Redemption Period)
The domain is not released the moment it expires — during this window it is still yours and can be recovered. Some extensions charge an extra restore fee at this stage, so renewing before expiry is always the cheaper route.
Pending Delete Period (Pending Delete Period)
If the redemption window is missed too, the domain enters the final stage and waits to be deleted. Renewal and recovery are no longer possible here; when the period ends the registration is removed for good.
Domain Is Available Again
Once deletion completes, the domain leaves the system and anyone can register it — popular names are often taken the same minute by someone watching. Keep auto-renewal on so a name you care about never gets this far.
.si Domain Specifications and Registration Rules
Registration conditions, supported features and the registry's own timelines in a single table.
.si Domain Registration
- Document Requirement There are no requirements for buying .si domain registration
- Country Slovenia
- Character Length 3 - 63 characters
- Registration Period 1 - 10 years
- Name Server Count 2 - 10 servers
.si Domain Support
- IDN Support No
- Transfer Support Yes
- Late Renewal Support No
.si Domain Registration Periods
- Registration Periods 1,2,3,4,5,6,7,8,9,10 years
- Renewal Periods 1,2,3,4,5,6,7,8,9,10 years
- Pre-registration 1 days
- Accounting Period 1 days
- Finalization Period 1 days
- Failure Period 1 days
- Payment Period 1 days
- Redemption Period 1 days
- Deletion Hold Period 1 days
- Renewal Time 1 Day
Frequently Asked Questions About .si Domains
The questions people actually ask before registering — answered plainly.
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No. The registry's general terms define the holder as «a natural or legal person who registers a domain name in accordance with these General terms and conditions»; nowhere do they ask for nationality, residence, establishment in Slovenia, a local address, an agent or paperwork. A company based in Türkiye, a sole trader and a private individual all register on the same footing. What is checked is your contact detail: at registration and again at every renewal the registrar must verify your email address or telephone number, both for correct format and for actually working. The registry warns plainly that failure to reach the holder by email can end in deletion, so keep that mailbox live.
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Between one and five years. The general terms define the period as «a renewable period of at least one and at most five years for which the Domain name is registered», and a separate clause spells out that registrars register or renew names for one, two, three, four or five years. There is therefore no six-year or ten-year .si registration. The term starts on the day of registration and ends on the same day of the month; on renewal the new period continues from the end of the previous one, so renewing early costs you nothing. If you would rather not commit long, a one-year registration is a perfectly normal choice.
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Two characters. The syntax clause of the general terms states that «the minimum length of a Domain name is two characters» and immediately adds a distinction that matters for internationalised names: the minimum applies to the name itself, not to its punycode form, so a single accented letter is refused even though its ACE string runs to eight characters. Measurement confirms the rule: two-letter .si names are registered and have been in use for years. The upper limit is sixty-three characters, and for internationalised names that ceiling applies to the punycode form. A name may not begin or end with a hyphen.
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Yes, since 2010. New terms that took effect that year opened two-character names and internationalised names on the same day. The registry's table of allowed characters lists the Slovenian č, š and ž on its first line, and because the table also covers the Latin-1 and Latin Extended blocks, letters such as ğ, ı, ş and ç are included as well. The name enters the zone file in punycode, meaning it is stored as the ASCII string beginning with xn--, and whois queries use that form too. Consider also registering the unaccented spelling: the registry publishes no bundle scheme that hands you equivalent forms for free.
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You get thirty days. If no renewal request arrives, the name is put into quarantine on the day the period ends: the registry removes the pointers from the .si zone servers, so your website and mail stop working at that moment. The general terms state that quarantine may not last longer than thirty days, and a renewal filed within that window clears the status and reactivates the name. At the end of the thirty days the name is deleted and anyone may register it. The thirty-day grace plus a separate redemption period familiar from generic extensions does not exist here — there is one window, and your service is already down throughout it.
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Not in the registry's public lookup. In a measurement taken in August 2026 both the classic whois output and the RDAP response returned only the domain name, the registrar, the name servers, the DNSSEC records, the status codes and the dates; the holder field carried an opaque handle and a «not disclosed» note. The rules say that for natural-person holders only the email address is published, and they oblige the registrar to tell you that you may use a functional mailbox unconnected to personal data instead of a private address. Disclosure to a third party requires a substantiated request evidencing a procedure already under way. Check your record on the whois search page.
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There are two separate operations. For a change of registrar you pick a password, hand the SHA-256 digest of it to your current registrar, who writes that digest into the name's authorisation field, and give the original password to the new registrar. The registry publishes a tool that produces the digest in your own browser, so the password never travels over the network. A change of holder is a different procedure and needs the consent of both the outgoing and the incoming holder; the registry emails both parties automatically once it completes. Neither operation shortens the term. Start on the domain transfer page.
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Through the alternative procedure known as ARDS. The registry itself administers it; the decision comes from external arbiters sitting on a tribunal organised independently within the registry, and the UDRP rules are applied only by analogy where the ARDS rules are not precise enough. A complainant must establish three conditions together: that the name is identical or confusingly similar to a trade mark valid in Slovenia, a company name in the Slovenian court register or another right recognised under Slovenian law; that the holder has no legitimate interest in it; and that it was registered or is being used in bad faith. Proceedings run in Slovenian, the fee is paid up front, and a case typically takes two to three months.
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Yes, both. The registry deployed DNSSEC in 2011 and completed the chain of trust the same year; the .si zone is signed today, and you can submit the signature digest for your own name to the registry through your registrar. Use is optional, but on a signed name expired signatures, or DNSSEC switched off without telling the parent zone, will stop the address resolving at all. There is also a Registry Lock: once it is active no change other than renewal is possible, and lifting it requires the registry to call your registrar's designated person and verify the request by phone. The extra security slows operations down but stops hijacking attempts in practice.
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