How To Call Czech Republic From US: Updated For 2025
Quick Answer
To call the Czech Republic from the United States:
- Landline or Mobile:
011 + 420 + Czech Number (9 digits)
Examples:
- For a Prague number (e.g., starting with 2):
011 + 420 + 2XX XXX XXX - For a Czech mobile phone (e.g., starting with 6 or 7):
011 + 420 + 6XX XXX XXX
The Czech Republic is on Central European Time (CET, UTC+1) / Central European Summer Time (CEST, UTC+2). This is generally 6 hours ahead of US Eastern Time (ET).
How to Dial Czech Republic from the US
How to Call a Landline in the Czech Republic
To call a Czech landline from the United States, follow these steps:
- Step 1 – Dial the US exit code: Start by dialing
011. - Step 2 – Dial Czech Republic's country code: Next, key in
420. - Step 3 – Dial the 9-digit Czech landline number: Czech landline numbers are 9 digits long. The Czech Republic uses a closed numbering plan, so no separate area code is dialed after the country code. The first digit(s) of the 9-digit number indicate the region or service type (e.g., Prague numbers typically start with
2).
For example, to call a Prague landline number 212 345 678, you would dial: 011 420 212 345 678
How to Call a Mobile Phone in the Czech Republic
Calling a Czech mobile phone from the US involves these steps:
- Step 1 – Dial the US exit code: Start by dialing
011. - Step 2 – Dial Czech Republic's country code: Next, key in
420. - Step 3 – Dial the 9-digit Czech mobile number: Czech mobile numbers are 9 digits long and typically begin with
6or7.
For example, if the Czech mobile number is 602 123 456, you would dial: 011 420 602 123 456 from the US.
Understanding Czech Phone Numbers
The Czech Republic uses the country code +420. It operates on a closed numbering plan, where all national phone numbers are 9 digits long after the country code. You do not need to dial a separate regional area code when calling from abroad.
Landline Numbers
- Format from US:
011 + 420 + XXX XXX XXX(9-digit number) - Czech landline numbers are 9 digits long. The first digit often indicates the geographical region:
2– Prague3– West Bohemia (e.g., Plzeň, Karlovy Vary)4– North Bohemia (e.g., Ústí nad Labem, Liberec)5– South Moravia & parts of East Bohemia (e.g., Brno, Olomouc)- Other initial digits are used for specific services or have been less common for geographic lines.
Mobile Numbers
- Format from US:
011 + 420 + XXX XXX XXX(9-digit number) - Czech mobile numbers are also 9 digits long and typically start with the digits
6or7.
Czech Republic Numbering Plan (No Separate Area Codes for Dialing)
When calling the Czech Republic from the US, after dialing 011 + 420, you dial the subscriber's complete 9-digit national number. The Czech Republic employs a closed numbering system, meaning traditional regional area codes are integrated into the 9-digit number and are not dialed separately.
The first digit of the 9-digit number indicates the type of service or general region for fixed lines:
| Starting Digit(s) of 9-digit Number (after +420) | Service Type / General Region Association |
|---|---|
2XX XXX XXX | Fixed Lines - Prague |
3XX XXX XXX | Fixed Lines - West Bohemia (e.g., Plzeň, Karlovy Vary, České Budějovice - South Bohemia also) |
4XX XXX XXX | Fixed Lines - North Bohemia (e.g., Ústí nad Labem, Liberec, Hradec Králové - East Bohemia also) |
5XX XXX XXX | Fixed Lines - South Moravia (e.g., Brno), North Moravia (e.g., Ostrava), parts of East Bohemia (e.g., Pardubice) & Vysočina (e.g., Jihlava) |
6XX XXX XXX | Mobile Phones (e.g., 601, 602, 603, 604, 605, 606, 607, 608) |
7XX XXX XXX | Mobile Phones (e.g., 70X, 72X, 73X, 77X, 79X) |
8XX XXX XXX | Special services (e.g., toll-free, shared cost) |
9XX XXX XXX | Special services (e.g., premium rate, internet dial-up) |
Note: For fixed lines, while the first digit gives a broad regional clue, the full 9-digit number is always required.
Czech Mobile Phone Prefixes
Czech mobile phone numbers are 9 digits long after the +420 country code. They begin with a 3-digit prefix, typically starting with 6 or 7.
| Operator (Original Assignment) | Mobile Prefixes (First 3 digits after +420) |
|---|---|
| O2 Czech Republic | 601, 602, 606, 607, 702, 704, 705, 72X |
| T-Mobile Czech Republic | 603, 604, 605, 703, 73X |
| Vodafone Czech Republic | 608, 77X, 790, 792, 797, 799 |
| Various MVNOs & other services | Other 70X, 79X ranges, 600 |
*Mobile Number Portability is active in the Czech Republic, so the prefix does not always guarantee the current service provider. The 'X' represents further digits of the prefix.
Time Difference
The Czech Republic operates on Central European Time (CET), which is UTC+1 during standard time. During summer, it observes Central European Summer Time (CEST), which is UTC+2. This change typically occurs from the last Sunday in March to the last Sunday in October.
The time difference compared to the US East Coast (ET):
- When the US East Coast is on Eastern Daylight Time (EDT, UTC-4) and the Czech Republic is on CEST (UTC+2): The Czech Republic is 6 hours ahead of ET. (e.g., 12 PM EDT is 6 PM in the Czech Republic).
- When the US East Coast is on Eastern Standard Time (EST, UTC-5) and the Czech Republic is on CET (UTC+1): The Czech Republic is 6 hours ahead of ET. (e.g., 12 PM EST is 6 PM in the Czech Republic).
Czech Republic's Phone System
The Czech Republic has a highly developed and modern telecommunications system, regulated by the Czech Telecommunication Office (ČTÚ - Český telekomunikační úřad). The country implemented a closed 9-digit numbering plan in 2002. The market is competitive, with major mobile operators including O2 Czech Republic, T-Mobile Czech Republic, and Vodafone Czech Republic, all offering extensive 4G/LTE services and actively deploying 5G networks. Fixed-line services, including high-speed broadband via DSL and fiber optics, are also widely available from these operators and others. Mobile number portability is well-established.
Best Times to Call
Considering the Czech Republic is typically 6 hours ahead of US Eastern Time (ET):
- For business calls from the US East Coast, morning ET is generally suitable. For instance, 9 AM - 11 AM ET would correspond to 3 PM - 5 PM in the Czech Republic.
- Typical business hours in the Czech Republic are Monday to Friday, approximately 8:00/9:00 AM to 5:00/6:00 PM CET/CEST.
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- Dial the local access number provided with your card.
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- Dial the full international number for the Czech Republic:
011 + 420 + Czech Number(9-digit number).
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