1. Emergency calls (always toll-free)

2. Prefixes
    Geographical  Mobile networks  Institutional networks  Special pricing 

3. References

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:

 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'''

Emergency calls (always toll-free)

• General emergency: 112
• Ambulance: 155
• Police: 158
• Fire brigade: 150
• Municipal police: 156

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.

Geographical

Mobile networks

• 601 - Telefónica 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 - Telefónica O2 Czech Republic (GSM system)
• 603 - T-Mobile (formerly named Paegas/RadioMobil)
• 604 - T-Mobile
• 605 - T-Mobile
• 606 - Telefónica O2 Czech Republic
• 607 - Telefónica O2 Czech Republic
• 608 - Vodafone Czech Republic (formerly named Oskar)
• 70 - (formerly Bleskmobil's range)
• 72 - Telefónica O2 Czech Republic
• 73 - T-Mobile
• 77 - Vodafone Czech Republic
• 790 - U:Fon (Mobilkom)
• 910 - VoIP non-geographic networks

Institutional networks

• 950 - Ministry of Labour and Social Affairs
• 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
• 973 - Ministry of Defence & Armed Forces of the Czech Republic
• 974 - Ministry of the Interior

Special pricing

• 800 - Zelená linka ("Green line") - toll-free
• 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)

References

• [https://web.archive.org/web/20120719105348/http://aplikace.mvcr.cz/archiv2008/sbirka/2007/zakon_05.html#castka_43 117/2007 Vyhláška o číslovacích plánech sítí a služeb elektronických komunikací] {{cs icon}}

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