|Updated 5 February 2018||By Country Code||By Country Name||Other WTNG pages||Acknowledgements|
|Czech Republic (Czechia)||+420|
Area Code: 1-5 digits Subscriber Number: 4-8 digits Trunk Prefix: none (formerly 0) International Prefix: 00
See the Czech renumbering website: http://www.telecom.cz/renumbering.
Also see announcement with number translation.
There was an earlier press release: Cesky Telecom - 18 Sept 2001.
See also Cesky Telecom announcement (via ITU).
See bulletin (in Czech) from regulator CTU.
Effective 28 February 1997, a split of country code 42 took effect:
Czech Republic: country code 420
Slovak Republic: country code 421
See Czech Info Center telephone information (muselik.com)
Also see numbering information link (via ITU).