# Telephone numbers in the Czech Republic

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 codes | region | former codes |
| 2 | Prague | 02 |
| 31, 32 | Central Bohemian Region | |
| 35 | Karlovy Vary Region | 017 Karlovy Vary |
| 37 | Plzeň Region | 019 Plzeň |
| 38, 39 | South Bohemian Region | 038 České Budějovice |
| 41, 47 | Ústí nad Labem Region | 047 Ústí nad Labem |
| 46 | Pardubice Region | 040 Pardubice |
| 48 | Liberec Region | 048 Liberec |
| 49 | Hradec Králové Region | 049 Hradec Králové |
| 51, 53, 54 | South Moravian Region | 05 Brno |
| 55, 59 | Moravian-Silesian Region | 069 Ostrava |
| 56 | Vysočina Region | 066 Jihlava |
| 57 | Zlín Region | 067 Zlín |
| 58 | Olomouc Region | 068 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 (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:
* 9522 – Všeobecná zdravotní pojišťovna, government-controlled health insurance company
* 9555 – Bank "Komerční banka (KB)", a part of the Société Générale (SG) international group, formerly government-controlled company
* 9567 – Bank "Česká spořitelna (ČS)", a part of the Erste Bank Group, formerly government-controlled company
* 972 – Czech Railways and Railway Administration
* 973 – Ministry of Defence & Armed Forces of the Czech Republic
* 974 – Ministry of the Interior

### 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)