Welcome to CZ.NIC Statistics

This web page is the entry point to graphs and statistics that are related to most aspects of CZ.NIC operations. Machine access to source data is possible via REST API, see the OpenAPI UI. Under the name Domain Report, CZ.NIC also publishes an annual data summary on the developments in the .CZ domain.

1 500 494

total CZ domains
Total number of domains in the CZ zone; updated every 300 seconds.

959 812

DNSSEC signed
Number of domains under CZ that are digitally signed using DNSSEC technology.

25 920

queries per second
Average number of queries per second handled by authoritative DNS servers for CZ during the previous day.

404

registered today
Number of domains registered since last midnight; updated every 300 seconds.

CZ Domain Registry

Some statistics are generated directly from the CZ Domain Registry – the master database of all domain names registered in the CZ top-level domain with associated information about the domain owner, registrar etc.

The graph on the right shows the evolution of the number of registered domains since 2008, together with the number of DNSSEC-secured domains.

Registry stats

Number of registered domains
201020152020202500.5M1M1.5M
DomainsDNSSEC domainsDateNumber of domains
DNS Traffic

CZ.NIC operates more than 100 authoritative servers for the CZ domain, located in ten countries worldwide, and four instances of ODVR public resolvers. Records about all DNS transactions handled by each server (with anonymised sources for the resolvers) are collected in an Apache Hadoop database, and then used for generating many statistics and performing ad hoc analyses.

The graph on the left displays a time series of the average number of DNS queries per second processed by servers of each type during the last month.

Auth server stats ODVR stats

DNS server traffic
Apr 62025Apr 13Apr 20Apr 2710k15k20k25k30k
DNSODVRDateQueries per second
MojeID

Since 2010, CZ.NIC operates the MojeID public authentication service. In 2020, MojeID was accredited by Ministry of interior and connected to NIA (National Identity Authority) as authentication option for access to governmental services.

The graph on the right shows the number of all logins to MojeID as well as logins to NIA during the last month.

MojeID stats

MojeID and NIA logins
Apr 62025Apr 13Apr 20Apr 272 0004 0006 000
Total loginsNIA loginsDateNumber of logins