Czech Republic phone number format
Czech Republic phone numbers use the country code +420. A mobile number 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.
Czech 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 |
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.
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 Email + 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.
That was one number. Your CRM export has thousands.
This tool checks one number at a time. Cleaning a list means every row in E.164, invalid numbers separated out, and the emails beside them checked too.
- Upload a CSV up to 100,000 rows with an email or phone column
- Every phone gets status, E.164 format, country and line type
- Emails in the same file get a real SMTP mailbox check
One plan, cancel anytime, no contract. The free tools stay free and unmetered either way — they are not a trial.