Skip to content
Get Started

Czechia Phone Numbers: Format, Area Code & Validation Guide

Explore Czechia's (+420) phone number system: formats, area codes, & validation. Understand 9-digit structure, landline (2XX XXX XXX), mobile (60X/7XX XXX XXX) patterns. Includes regex for validation.

Phone number standards3 min read

Quick Reference Guide

  • Country: Czechia
  • Country Code: +420
  • International Prefix: 00
  • National Prefix: None
  • Numbering Plan Type: Closed numbering plan
  • Regulatory Authority: ??esk?? Telekomunika??n?? ????ad (CTU)

Overview

Discover the intricacies of Czechia's telephone numbering system with this detailed guide. Perfect for telecom professionals, developers, and system administrators, it covers phone number structures, dialing procedures, and essential telecommunications data.

Number Formats in Czechia

Czechia employs a closed numbering plan, ensuring all phone numbers are fixed-length and require no national prefix for domestic calls. The plan includes various services like geographic, mobile, and special service numbers.

General Phone Number Structure

  • Format: +420 NXX XXX XXX
  • Length: 9 digits (excluding the country code)
  • Country Code: +420
  • N: Represents the type of service or geographic area

Geographic Numbers (Landlines)

RegionArea Code(s)Example Number
Prague22XX XXX XXX
Central Bohemian Region31, 3231X XXX XXX
Karlovy Vary Region3535X XXX XXX
Plze?? Region3737X XXX XXX
South Bohemian Region38, 3938X XXX XXX
??st?? nad Labem Region41, 4741X XXX XXX
Pardubice Region4646X XXX XXX
Liberec Region4848X XXX XXX
Hradec Kr??lov?? Region4949X XXX XXX
South Moravian Region51, 53, 5451X XXX XXX
Moravian-Silesian Region55, 5955X XXX XXX
Vyso??ina Region5656X XXX XXX
Zl??n Region5757X XXX XXX
Olomouc Region5858X XXX XXX

Mobile Numbers

Mobile OperatorNumber Range(s)Example Number
O2 Czech Republic601, 602, 606, 607, 72602 XXX XXX
T-Mobile603, 604, 605, 73603 XXX XXX
Vodafone Czech Republic77, 608777 XXX XXX
U:Fon790790 XXX XXX

Toll-Free Numbers

  • Format: 800 XXX XXX
  • Example: 800 123 456

Premium Rate Numbers

  • Format: 90X XXX XXX
  • Example: 900 123 456

Shared Cost Numbers

  • Format: 8[134]X XXX XXX
  • Example: 811 123 456

Special Services and Emergency Numbers

  • Emergency Services: 112
  • Directory Enquiries: 118X

Numbering Scheme (Regular Expressions)

For developers and system administrators, use these regular expressions to validate Czechia phone numbers:

Regex
// General Czechia Number Format
/^(
+420)?[2-9]\d{8}$/

// Geographic Numbers (Landlines)
/^(
+420)?(2|3[1257-9]|4[16-9]|5[13-9])\d{7}$/

// Mobile Numbers
/^(
+420)?(60[1-8]|7[023-9])\d{6}$/

// Toll-Free Numbers
/^(
+420)?800\d{6}$/

// Premium Rate Numbers
/^(
+420)?90[05689]\d{6}$/

// Shared Cost Numbers
/^(
+420)?8[134]\d{7}$/

Dialing Procedures

Domestic Calls

  • Landline to Landline: Dial the full 9-digit number.
  • Landline to Mobile: Dial the full 9-digit number.
  • Mobile to Mobile: Dial the full 9-digit number.

International Calls

  • Outgoing: Dial 00 followed by the country code, and then the full national number.
  • Incoming: Dial +420 followed by the 9-digit local number.

Number Portability

Czechia supports number portability, allowing users to keep their numbers when switching providers. This applies to both mobile and fixed-line numbers, regulated by the ??esk?? Telekomunika??n?? ????ad (CTU).

Major Telecom Operators and Number Ranges

OperatorMobile Number RangesLandline Areas Covered
O2 Czech Republic601, 602, 606, 607, 72National
T-Mobile603, 604, 605, 73National
Vodafone Czech Republic77, 608National
U:Fon790National

Number Allocation and Management

The ??esk?? Telekomunika??n?? ????ad (CTU) oversees phone number allocation and management in Czechia, ensuring compliance with ITU-T E.164 standards.

Technical Considerations

For Developers and Systems Administrators

  • Number Validation: Utilize the provided regular expressions for Czechia phone number validation.
  • Portability Handling: Implement logic to manage number portability, especially for mobile numbers where prefixes may not indicate the current provider.
  • Emergency Services: Ensure systems recognize and route calls to emergency numbers like 112.
  • Internationalization: Always include the +420 country code for international calls.

Frequently asked questions

The country code for Czechia is +420. Always include this code when making international calls to Czechia to ensure proper routing. For outgoing international calls from Czechia, use the international prefix 00 followed by the country code and national number.

Czechia phone numbers follow a closed numbering plan with a format of +420 NXX XXX XXX, totaling 9 digits after the country code. The 'N' represents the service type or geographic area, ensuring fixed-length numbers without a national prefix for domestic calls.

Dial the full 9-digit number directly, whether calling from a landline or mobile phone within Czechia. No national prefix is needed for domestic calls due to the closed numbering plan.

The area code for Prague is 2. A complete Prague landline number would follow the format +420 2XX XXX XXX, where X represents the remaining digits.

Czechia mobile numbers typically begin with 601-608, 72, 73, 77, or 790. These prefixes are associated with major mobile operators like O2, T-Mobile, and Vodafone.

Czechia toll-free numbers use the prefix 800 followed by six digits. A typical toll-free number looks like 800 XXX XXX.

The article provides regular expressions for validating different Czechia number formats. These regex patterns can be used in programming and system administration for accurate number verification.

The Czech Telecommunication Office (CTU) is the regulatory authority responsible for managing phone number allocation, number portability, and overall compliance with international telecommunication standards.

Czechia supports number portability for both fixed-line and mobile numbers, allowing users to switch providers while retaining their existing phone number. This is regulated by the CTU.

A closed numbering plan in Czechia enforces fixed-length phone numbers, simplifying dialing procedures and number management. No national prefix is needed for domestic calls, ensuring consistency across the country.

Always include the +420 country code when making international calls to Czechia. This ensures the call is correctly routed by international carriers.

Developers should utilize the provided regular expressions for number validation, handle number portability in their logic, ensure proper routing of emergency numbers like 112, and always include the +420 country code for international calls.

One API. Every channel.

Contact Sales