This free Italian phone number checker shows whether a number is valid.
An Italian phone number checker tells you whether a number is real, which means it follows Italy's numbering rules and is assigned. Enter a +39 number above and 1Lookup's free checker returns valid or invalid in seconds, with the line type and country, checked against Italy's numbering plan.
Pick the country, then enter the number without the country code.
Free & rate-limited. No signup required to try.
- Country code
- +39
- Mobile numbers
- 9 to 10 digits after +39, starting 3 or 4
- Landlines
- 6 to 11 digits after +39, starting 0, such as +39Â 02Â XXXÂ XXXX
- Written at home
- 312 345 6789
- Written for apps and SMS
- +393123456789
- Dialed from the US
- 011 39 312 345 6789
An Italian mobile number is +39 followed by 9 to 10 digits, and the first one is 3 or 4.
Written with the country code
- +39Country code
- 3Mobile start
- 12 345 67899 more digits
The +39 comes before the number and is dropped when you dial inside Italy.
An Italian phone number checker reads a number's format first and then checks it against Italy'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 312 345 6789, or paste it with +39.
- Its format is checkedEach type of number has its own rules. A mobile needs 9 to 10 digits after +39 and starts with 3 or 4 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 Italy'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.
An Italian mobile number has 9 to 10 digits after +39 and starts with 3 or 4, so any other length is not a valid mobile.
These lengths come from the numbering data for Italy. The 0 at the start of a landline is part of the number, so it stays when the number is written with +39.
| Number type | Starts with at home | Digits after +39 | Written at home |
|---|---|---|---|
| Mobile | 3 or 4 | 9 to 10 | 312 345 6789 |
| Landline | 0 | 6 to 11 | 02 XXX XXXX |
Three common mistakes make an Italian number fail the check, and each one is quick to fix.
Repeating +39 adds digits.
Write +39 312 345 6789 once, with the country code at the front.
Typing too few or too many digits makes a number invalid.
A mobile number has 9 to 10 digits after +39. With fewer than 9 or more than 10 it cannot be a valid mobile, and inside that range the first digits decide how many are needed, 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 Italy selected for a +39 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 Italian phone numbers.
How do I check if an Italian phone number is valid?
Enter the number in the box above with Italy 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 312 345 6789, or in full as +39 312 345 6789.
How many digits is an Italian phone number?
A mobile number has 9 to 10 digits after +39. A landline has 6 to 11 digits after +39, such as +39 02 XXX XXXX.
What does an Italian mobile number start with?
Mobile numbers start with 3 or 4 at home, which is 3 or 4 after +39.
How do I write an Italian number for an app or an SMS tool?
Use the E.164 form: a plus sign, 39, then the number and no spaces, such as +393123456789.
Does the Italian 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 Italian number is active?
No. Valid means the number is real, correctly written for Italy 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 Italian 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.
What are the landline area codes of Milan, Rome and Naples?
The codes are 02 for Milan, 06 for Rome and 081 for Naples. From abroad you dial +39 and then the code, so Milan is +39 02. The area code is part of the digits of a landline number.
You can check numbers from other countries on their own pages.
- +61Australian phone number checker
- +1Canadian phone number checker
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- +65Singapore phone number checker
- +234Nigerian phone number checker
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- +27South African phone number checker
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These free tools answer the next question about a number.
- The +39 country code pageHow to dial Italy, 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.