Czech Republic phone number format
How do you format a Czech Republic phone number?
Write a Czech Republic phone number with the country code +420. A mobile looks like 601 123 456 inside the Czech Republic and +420 601 123 456 from abroad. Mobiles have 9 digits after the country code, and the E.164 form is +420601123456. A format check confirms the digits fit the numbering plan, not that the number is in service.
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Paste your Czech Republic numbers (a mixed list is fine). They are counted here at once; the free checker then gives every number its E.164 form, country and line type, with a file to download.
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See the phone add-onCzech Republic number format at a glance
| Country calling code | +420 |
|---|---|
| International prefix (calling out of the Czech Republic) | 00 |
| Trunk prefix (domestic dialling) | None |
| Mobile number length | 9 digits after +420 |
| Landline number length | 9 digits after +420 |
| Mobile vs landline from the digits | Yes, separate ranges |
In short: +420, 9 digits for a mobile. The checker below formats any Czech Republic number free in your browser; it can't say whether a line is live. Bulk phone number validator · Pro + Phone plan
Example Czech Republic phone numbers
These are the example numbers from Google’s libphonenumber data, the same numbering-plan data our validator uses, written three ways.
| Format | Mobile | Landline |
|---|---|---|
| National (inside the Czech Republic) | 601 123 456 | 212 345 678 |
| International | +420 601 123 456 | +420 212 345 678 |
| E.164 | +420601123456 | +420212345678 |
How to write a Czech Republic number in E.164
- Remove spaces, dashes, dots and brackets so only digits are left.
- The Czech Republic has no trunk prefix, so keep every digit of the national number.
- Put +420 in front. The result has 9 digits after the country code for a mobile.
So 601 123 456 becomes +420601123456. E.164 is the format SMS gateways, dialers and most CRMs store; see the E.164 format explained for why.
Mobile or landline?
The Czech Republic allocates separate number ranges to mobiles and landlines, so a numbering-plan check reads the line type straight from the digits, for free. That type describes the range the number came from. It doesn’t prove the number is connected today.
Mobile, landline and special number ranges in Czech Republic
A Czech Republic mobile number starts with 601–608, 702–705, 7060, 719, 72, 73, 77, 79 after +420. Every valid number of each type below starts with one of the digit groups shown. A number that starts the right way can still be unassigned: the groups say what a range is for, not that a number is connected.
| Type | Starts with, after +420 | Digits | Example |
|---|---|---|---|
| Mobile | 601–608, 702–705, 7060, 719, 72, 73, 77, 79 | 9 | +420 601 123 456 |
| Landline (fixed line) | 2, 31, 32, 35, 37–39, 41, 46–49, 51, 53–59 | 9 | +420 212 345 678 |
| Toll-free | 800 | 9 | +420 800 123 456 |
| Premium rate | 900, 905, 906, 908, 909, 976 | 9 | +420 900 123 456 |
| Shared cost | 81, 83, 84 | 9 | +420 811 234 567 |
| Universal access (UAN) | 95, 972–974 | 9 | +420 972 123 456 |
| Personal number | 700, 701 | 9 | +420 700 123 456 |
| VoIP | 910, 970 | 9 | +420 910 123 456 |
| Voicemail access | 93, 96 | 9 to 12 | +420 93 123 456 789 |
More on Czech Republic’s free-to-call and charged ranges: toll-free and premium numbers in the Czech Republic.
Sources, checked 5 November 2026
- Ranges, lengths and examples: Google libphonenumber numbering-plan data (libphonenumber-js 1.13.15), the data our validator uses.
- Official plan: ITU-T E.164 national numbering plan for Czech Rep., which covers Czech Republic. The regulator’s filing is the authority when the two disagree.
Validate a list of Czech Republic numbers
Check a single number with the free phone number validator. For a whole file, upload the CSV to the verifier: every row gets a status, the E.164 number, the country and the line type, and emails in the same file get a live mailbox check. The Pro + Phone plan ($49.99 a month) adds 5,000 live carrier lookups a month for the real line type and current carrier.
Common questions
- What is the country code for the Czech Republic?
- The country calling code for the Czech Republic is +420. When you call the Czech Republic from abroad, dial your international prefix (or +) followed by 420 and the number.
- How many digits is a Czech Republic phone number?
- A Czech Republic mobile number has 9 digits after the country code +420, the same as a landline.
- How do I write a Czech Republic number in international format?
- Start with +420, then add the rest of the number. The mobile number 601 123 456 becomes +420 601 123 456, or +420601123456 in E.164, the form most CRMs and SMS tools expect.
- Can you tell if a Czech Republic number is a mobile?
- Usually, yes. Czech Republic numbers come from ranges allocated separately to mobiles and landlines, so a numbering-plan check reads the line type from the digits. It tells you what the range is for, not whether the number is in service.
- Does a valid format mean a Czech Republic number is in service?
- No. A valid format means the digits fit a range Czech Republic's numbering plan allocates. It cannot tell whether the number is connected today or who carries it, because numbers are reassigned and ported. A live carrier lookup reports the current carrier and line type, but even that does not prove someone answers.
- Can I check a list of Czech Republic numbers for free?
- Yes. Paste them in the list tab above or upload a CSV to the bulk phone number validator: E.164, country, format status and numbering-plan line type are free for every row, with no account. Live carrier and line-type lookups come with Pro + Phone at $49.99/mo (5,000 a month).
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