🇸🇰 .sk — Slovakia
The .sk is a country-code top-level domain (ccTLD) operated by SK-NIC, a.s.. This article documents the technical, operational, and contractual requirements for the TLD, along with special considerations for registry, registrar, and domain management.
General Information
| Property | Value |
|---|---|
| TLD Type | ccTLD |
| Registry | SK-NIC, a.s. |
| Registry Country | Slovakia |
| Registry Website | www.sk-nic.sk |
| Provisioning Protocol | EPP |
| Second-Level Registration | ✅ Yes |
| Accreditation Required | ✅ Yes |
Domain Lifecycle
| Property | Value |
|---|---|
| Registration Period | 1–10 years |
| Renewal Period | 1–10 years |
| Transfer Renewal Period | 1 year |
| Deletion Policy | Immediate, At expiration |
| Auto-Renew Enabled | ❌ No |
| Auto-Renewal Before Expiry | On expiration |
| Sync After Operations | registration, renewal, transfer |
Grace periods
| Period | Duration |
|---|---|
| Add Grace Period | 0 days |
| Standard Grace Period | 0 days |
| Redemption Period | 40 days |
| Pending Restore | 0 days |
| Pending Delete | 0 days |
Launch Phases & Availability
| Property | Value |
|---|---|
| General Availability | ✅ TLD is live |
| TMCH / Trademark Claims | ❌ No |
Domain Characteristics
| Property | Value |
|---|---|
| Domain Length | 1–63 characters |
| IDN Support | ❌ No |
| Premium Domains | ❌ No |
| Reserved Domains | ❌ No |
| Registry Lock | ❌ No |
Contacts & Roles
| Property | Value |
|---|---|
| Required Contacts | Domain Owner, Administrator, Technical Contact, Billing Contact |
| Supported Roles | Domain Owner, Administrator, Technical Contact, Billing Contact |
| Thick WHOIS | ✅ Yes |
| Privacy Proxy Allowed | ❌ No |
| Contacts Transferable | ❌ No |
| Allowed Postal Types | Local, International |
| AuthInfo Required | ✅ Yes (16–63 characters) |
Nameservers & DNS
| Property | Value |
|---|---|
| Nameserver Count | 0–13 |
| Host Objects Allowed | ✅ Yes |
| Registry Nameserver Check | ❌ No |
| DNSSEC Allowed | ✅ Yes |
| DNSSEC Required | ❌ No |
| DNSSEC Mode | DS |
| CZDS (Zone Download) | ❌ No |
Transfer Policy
| Property | Value |
|---|---|
| Transfer Lock Enabled | ✅ Yes (0 days after registration; 0 days after transfer) |
| Transfer Duration | 0 days |
| Transfer Extends Domain | ✅ Yes (+1 year) |
| Transfer via AuthInfo | ✅ Yes |
| Confirmation Required | ❌ No |
WHOIS & RDAP
| Property | Value |
|---|---|
| WHOIS Server | whois.sk-nic.sk |
Dispute Resolution
| Property | Value |
|---|---|
| Dispute Resolution Available | ❌ No |
Local Presence
| Property | Value |
|---|---|
| Local Presence Required | ✅ Yes |
| Applies To Roles | Domain Owner |
| Requirements | Physical Address |
| Eligible Countries | AT, BE, BG, HR, CY, CZ, DK, EE, FI, FR, DE, GR, HU, IE, IT, LV, LT, LU, MT, NL, PL, PT, RO, SK, SI, ES, SE, IS, LI, NO, CH, GB |
Contact Attributes
.sk registrations carry registry-specific contact attributes beyond the standard EPP fields:
| Attribute | Type | Required | Applies to | Allowed values |
|---|---|---|---|---|
SK_NIC_LEGAL_FORM |
Enum | ➖ Optional | All roles | CORP | PERS |
SK_NIC_IDENT_VALUE |
String | ➖ Optional | All roles | Company identifier (CORP) or date of birth YYYY-MM-DD (PERS) |
The extension exists to discern the legal form of the contact, mainly for personal-data-protection reasons.
When SK_NIC_LEGAL_FORM is omitted, the legal form is derived from the contact: a contact with an org is treated as CORP, otherwise PERS.
Supplying SK_NIC_LEGAL_FORM explicitly overrides that derivation (needed for a self-employed entrepreneur, who is a natural person but registers as CORP).
These per-attribute constraints are machine-readable: each possible_attributes entry returned by GET /v1/tlds/sk carries its own type, required, and values fields.
Legal Form & Identification
Each .sk contact declares its legal form through SK_NIC_LEGAL_FORM, and may optionally provide an identifier through SK_NIC_IDENT_VALUE. The identifier type depends on the legal form.
| Legal form | Constant | Identifier (SK_NIC_IDENT_VALUE) |
Format |
|---|---|---|---|
| Natural person | PERS |
Date of birth | YYYY-MM-DD (e.g. 1987-01-01) |
| Legal person or self-employed entrepreneur | CORP |
Company identifier (IČO for Slovak legal persons; the equivalent business number from the relevant official register for foreign legal persons) | String, up to 32 characters |
The identifier is not mandatory, but the registry strongly recommends providing it to better identify the user and to support their claim to the domain.
