.cz Domain: Czechia ccTLD Guide

Updated October 2026

.cz is the country-code top-level domain for the Czechia. The Czech Republic's national extension.

Overview

Extension.cz

Country or territory

Czechia

RegionEurope

RegistryCZ.NIC, z.s.p.o.

Who can registerOpen worldwide

TypeNational country code

Czech businesses and individuals use it as the standard local domain, and it is popular for sites aimed at Czech-speaking audiences.

The .cz domain was introduced on 13 January 1993, after the dissolution of Czechoslovakia, whose code was .cs. It is run by CZ.NIC, an association that administers the domain and whose website is nic.cz. DNSSEC is supported.

Names are registered directly at the second level, for example example.cz, through accredited registrars. The length limit is 63 characters, and names may contain letters a to z, digits and hyphens. A hyphen cannot be the first or last character, and hyphens cannot occupy both the third and fourth positions.

CZ.NIC has chosen not to offer diacritics under .cz, citing insufficient demand and lower accessibility from abroad. Registrations are therefore limited to plain ASCII characters, and Czech words are normally written without accents.

A newly registered name must be verified by email; unverified domains are suspended and may be deleted by the registry. Registration terms run from 1 to 10 years. The registry reported 1,502,253 domains on 8 August 2025.

Who can register

Anyone can register a .cz name on a first-come, first-served basis, with no local connection required. Registrations are placed through accredited registrars, and email verification is required to activate a new domain.

Rules and prices change. This summary is general information, not legal advice: confirm the current policy with the registry before you buy. The registry's website is www.nic.cz. The official record for .cz is in the IANA root zone database.

Before you buy a .cz name

Check the renewal price as well as the first-year price. Our cost calculator shows what a name really costs over time.
Make sure you meet the eligibility rules yourself, without relying on a trustee if you can avoid it.
Search for trademarks and for the same name in .com.
Say the name out loud: will people type it correctly?

Weighing up a specific .cz name? TLD.is gives an AI appraisal that explains a name's strengths and weaknesses.