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.cz

Country code top-level domain for the Czech Republic

Field	Value
name	.cz
image	DotCZ domain logo.png
introduced	13 January 1993
type	Country code top-level domain
status	Active
registry	CZ.NIC
sponsor	CZ.NIC
registereddomains	1,502,253
dateregistereddomains	2025-08-08
refregistereddomains
intendeduse	Entities affiliated with the Czech Republic
actualuse	Very popular in the Czech Republic
restrictions	Businesses must provide tax registration number
structure	Names can be registered directly at second level
document	[Rules](https://www.nic.cz/en/page.php?sid=17)
disputepolicy	[Problems](https://www.nic.cz/en/page.php?aid=151&sid=37&wid=1)
website	[nic.cz](https://www.nic.cz/en/page.php?sid=13)
dnssec	yes

.cz is the country code top-level domain (ccTLD) for the Czech Republic administered by CZ.NIC.

History

Until Czechoslovakia was dissolved in 1993, it used the domain .cs.The .cz domain came into effect in January 1993, following the dissolution of Czechoslovakia.

In 2009, new European Union legislation came into effect, allowing the use of diacritics in second-level domains under the .eu domain only.

Registration

The .cz domain, operated by the CZ.NIC association, continued to only offer standard characters, citing insufficient demand and lower accessibility from abroad as reasons behind their decision.

Czech customers were among the most interested in the new domains, only Germans bought more, with the French in third.

Over 850,000 internet sites had been registered as .cz by the end of 2011.

In 2012, the number exceeded one million. The Czech Republic was therefore the 12th European Union member state with a top-level domain to top a million active domain names.

At the end of 2011, CZ.NIC reported that ownership of all domains, 58% were by individuals, whereas those held by organisations accounted for a minority of 42%. Domains were most popular in Prague, followed by Brno and Ostrava.

Requirements

Registrations must be ordered via accredited domain name registrars.

The maximum domain name length permitted is 63 characters, which may only be alphanumeric or the hyphen (-).

Hyphens are restricted in that they may not be the first or last character, neither may they appear consecutively.

As of 2013, there are six domains which use the maximum of 63 characters.

References

(2025-08-08). "Summary CZ.NIC Statistics".
Willoughby, Ian. (21 November 2012). "Millionth internet site with Czech .cz domain name registered". Radio Prague.
Borufka, Sarah. (11 December 2009). "New EU regulation allows use of diacritics for certain web domains". Radio Prague.
"2011 Annual Report". CZ.NIC.
(23 November 2012). ".CZ Reaches One Million Active Domains". domainpulse.com.
"Rules of Domain Name Registration Under ccTLD .cz".
"10 domains with the highest number of characters". CZ.NIC.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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