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.

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:

After the change, the dialing arrangements for calls to Brno were as follows:

In the case of mobile numbers, which had to be dialed in full, the only change was that the 0 was no longer used:

Emergency calls (always toll-free)

  • General emergency: 112
  • Ambulance: 155
  • Police: 158
  • Fire brigade: 150
  • Municipal police: 156
  • Mountain rescue service: 1210

Other Emergency Numbers:

  • Urgent gas leak: 1239
  • Emergency Road Service (ABA): 1240
  • Emergency Road Service (ÚAMK): 1230

Services Numbers

O2 offers several over-the-phone information services for a fee. Note that many of the services are offered only in Czech:

  • Info Line (Czech Number Directory): 1180
  • Info Line (Foreign Number Directory): 1181
  • Operator for changed numbers (re-numbering): 141 11
  • Information on air quality: 141 10
  • Exact time: 141 12
  • Weather: 141 16
  • Medical Information: 141 20
  • Operator for international phone calls: 133 003

Prefixes

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.

Geographical

calling codesregionformer codes
2Prague02
31, 32Central Bohemian Region
35Karlovy Vary Region017 Karlovy Vary
37Plzeň Region019 Plzeň
38, 39South Bohemian Region038 České Budějovice
41, 47Ústí nad Labem Region047 Ústí nad Labem
46Pardubice Region040 Pardubice
48Liberec Region048 Liberec
49Hradec Králové Region049 Hradec Králové
51, 53, 54South Moravian Region05 Brno
55, 59Moravian-Silesian Region069 Ostrava
56Vysočina Region066 Jihlava
57Zlín Region067 Zlín
58Olomouc Region068 Olomouc

Mobile networks

  • 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 Czech Republic
  • 604 – T-Mobile Czech Republic
  • 605 – T-Mobile Czech Republic
  • 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 Czech Republic
  • 77 – Vodafone Czech Republic
  • 790 – O2 Czech Republic

Non-geographic networks

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)
  • (in Czech)
  • (in Czech)
  • (in Czech)