This free French phone number checker shows whether a number is valid.
A French phone number checker tells you whether a number is real, which means it follows France's numbering rules and is assigned. Enter a +33 number above and 1Lookup's free checker returns valid or invalid in seconds, with the line type and country, checked against France's numbering plan.
Pick the country, then enter the number without the country code.
Free & rate-limited. No signup required to try.
- Country code
- +33
- Mobile numbers
- 9 digits after +33, or 10 written at home, starting 06 or 07
- Landlines
- 9 digits after +33, starting 01, 02, 03, 04 or 05, such as +33Â 1Â XXÂ XXÂ XXÂ XX
- Written at home
- 06 12 34 56 78
- Written for apps and SMS
- +33612345678
- Dialed from the US
- 011 33 6 12 34 56 78
A French mobile number is +33 followed by 9 digits, and the first one is 6 or 7.
Written with the country code
- +33Country code
- 6Mobile start
- 12 34 56 788 more digits
Written at home
- 0Replaces +33
- 6Mobile start
- 12 34 56 788 more digits
The +33 and the 0 do the same job, so a number is never written with both.
A French phone number checker reads a number's format first and then checks it against France's numbering plan.
This is the path one check takes. A number can be written correctly and still not be assigned to anyone, so the format check alone is not the answer.
- You enter the numberType it the way it is written at home, such as 06 12 34 56 78, or paste it with +33.
- Its format is checkedEach type of number has its own rules. A mobile needs 9 digits after +33 and starts with 06 or 07 at home.
- It is checked against the numbering planNumbers outside the US and Canada are checked against the numbering plan of their country, which for this page is France's.Nothing is sent to the number, so it never rings and its owner is never told.
- You see valid or invalidWith the line type and country in a few seconds, and the carrier or network where one is listed.
A French mobile number has 9 digits after +33 and starts with 06 or 07, so any other length is not a valid mobile.
These lengths come from the numbering data for France. A mobile number has 10 digits when it is written at home with its 0.
| Number type | Starts with at home | Digits after +33 | Written at home |
|---|---|---|---|
| Mobile | 06 or 07 | 9 | 06 12 34 56 78 |
| Landline | 01, 02, 03, 04 or 05 | 9 | 01 XX XX XX XX |
Three common mistakes make a French number fail the check, and each one is quick to fix.
Keeping the 0 after +33 adds a digit.
The 0 is only for dialing inside France, so +33 06 12 34 56 78 is wrong. Drop the 0 and write +33 6 12 34 56 78.
Typing too few or too many digits makes a number invalid.
A mobile number has 9 digits after +33. With 8 or 10 it cannot be a valid mobile, so look for a missing or doubled digit.
Leaving the wrong country selected changes how the number is read.
The checker reads a number by the rules of the country selected above, so keep France selected for a +33 number. Paste a number with its + and country code and the country is read from the number itself.
These are the questions people ask most about checking French phone numbers.
How do I check if a French phone number is valid?
Enter the number in the box above with France selected. The free checker returns valid or invalid in seconds, with the line type and country. Type it the way it is written at home, such as 06 12 34 56 78, or in full as +33 6 12 34 56 78.
How many digits is a French phone number?
A mobile number has 9 digits after +33, or 10 written at home. A landline has 9 digits after +33, such as +33 1 XX XX XX XX.
What does a French mobile number start with?
Mobile numbers start with 06 or 07 at home, which is 6 or 7 after +33.
How do I write a French number for an app or an SMS tool?
Use the E.164 form: a plus sign, 33, then the number without its leading 0 and no spaces, such as +33612345678.
Does the French phone number checker show the carrier?
It shows the carrier or network where one is listed. Numbers outside the US and Canada are checked against the numbering plan of their country rather than live carrier data, so some come back with no carrier name.
Does valid mean the French number is active?
No. Valid means the number is real, correctly written for France and assigned. Whether a line is switched on and reachable right now is a different question, and the free HLR lookup answers it.
Can I check a whole list of French phone numbers?
Yes. This free tool checks one number at a time. A 7-day free trial opens CSV upload and the API, at 1 credit a number.
Does the person know I checked their number?
No. The check reads records only. No call or text goes to the number, so its owner is never told.
You can check numbers from other countries on their own pages.
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- +1Canadian phone number checker
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These free tools answer the next question about a number.
- The +33 country code pageHow to dial France, the time there now and the landline places.
- HLR lookupCheck whether a mobile number is switched on and reachable right now.
- Line type lookupSee whether a number is a mobile, a landline or VoIP.
- Carrier lookupFind the carrier or network behind a number.
- Phone validator for any countryThe same check with the country picker open to every country.
- Phone validation APIRun the same check from your own software, one request per number.
Sources: Google's libphonenumber numbering data for lengths, mobile starts and landline starts, as of September 24, 2026; the ITU list of country codes.