Following the break-up of Czechoslovakia in 1993, the successor states, the Czech Republic and Slovakia, continued to share the 42 country code until 28 February 1997, with the Czech Republic then adopting 420 and Slovakia adopting 421.[1]
"+42" redirects here. For telephone numbers in Slovakia, see
+421. For telephone numbers in Liechtenstein, see
+423.
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On September 22, 2002, the Czech Republic adopted a closed numbering plan, with nine-digit numbers used for local and national calls, and the dropping of the trunk code 0.
Before the change, the following arrangements would have been made for calls to Brno:
Local call: xx xx xx xx
National call: 05/xx xx xx xx
International call: +420 5 xx xx xx xx
After the change, the dialing arrangements for calls to Brno were as follows:
Within Czech Republic: 5xx xxx xxx
Outside Czech Republic: +420 5xx xxx xxx
In the case of mobile numbers, which had to be dialed in full, the only change was that the 0 was no longer used:
Within Czech Republic: 602 xxx xxx
Outside Czech Republic: +420 602 xxx xxx
The first 1-3 digits (after +420) of the telephone number indicates location or network. For mobile phones, since there is number portability, the mobile phone code only indicates the original operator. For example, when a person calls a number starting with 73 (T-Mobile) but had been ported to another operator, a short voice message in Czech and English is played stating "you are calling out of a T-Mobile network" before the ringing tone. It is possible to disable this voice message.
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Mobile networks
601 xxx xxx
602 xxx xxx
603 xxx xxx
604 xxx xxx
605 xxx xxx
606 xxx xxx
607 xxx xxx
608 xxx xxx
702 xxx xxx
703 xxx xxx
704 xxx xxx
705 xxx xxx
72x xxx xxx
730 xxx xxx
731 xxx xxx
732 xxx xxx
733 xxx xxx
734 xxx xxx
735 xxx xxx
736 xxx xxx
737 xxx xxx
738 xxx xxx
739 xxx xxx
770 xxx xxx
771 xxx xxx
772 xxx xxx
773 xxx xxx
774 xxx xxx
775 xxx xxx
776 xxx xxx
778 xxx xxx
779 xxx xxx
790 xxx xxx
791 xxx xxx
792 xxx xxx
793 xxx xxx
794 xxx xxx
797 xxx xxx
799 xxx xxx
- 601 - O2 Czech Republic (formerly NMT, numbers were ported to GSM in 2006; also used as part of the PPP log-in when dialling in the CDMA network) (formerly named EuroTel)
- 602 - O2 Czech Republic (GSM system)
- 603 - T-Mobile (formerly named Paegas/RadioMobil)
- 604 - T-Mobile
- 605 - T-Mobile
- 606 - O2 Czech Republic
- 607 - O2 Czech Republic
- 608 - Vodafone Czech Republic (formerly named Oskar)
- 70 - (formerly Bleskmobil's range)
- 72 - O2 Czech Republic
- 73 - T-Mobile
- 77 - Vodafone Czech Republic
- 790 - U:Fon (Mobilkom)
- 910 - VoIP non-geographic networks
Non-geographic networks
910 - VoIP
Institutional networks
These prefixes belong to the following networks:
Special pricing
- 800 - Zelená linka ("Green line") - toll-free (800 00 - Home Country Direct)
- 844 (also 81, 83, 843, 845, 846, 855) - Modrá linka (Blue line) - local call tariff from all Czech landlines
- 840 (also 841, 842, 847, 848, 849) - Bílá linka (White line) - national call tariff from all Czech landlines
- 90 - premium tariff
- 971 - dial-up internet access
- 976 xx - premium-priced dial-up internet access (priced at CZK xx per minute)