Italy phone number validator
How the phone number format works
- Format
- Italy phone number in national or international (+39) format
- Example
- +393123456789
Things to watch for
- Accepts national or international (E.164, e.g. +39...) format
- Validated with Google's libphonenumber; confirms the number is possible/valid for this country, not that it is currently assigned or reachable
^[+]?[0-9 ()\-]{6,}$An Italian phone number breaks the usual rule that a leading 0 gets dropped for international dialling. A Rome landline (06 12345678) keeps its 0 in both national and international form — +39 06 12345678, not +3961234567 — because in Italy’s numbering plan that 0 is part of the subscriber number, not a separate trunk prefix. Mobile numbers sidestep the issue entirely: they start with 3 (3XX) and never carried a leading 0, so 320 1234567 becomes +393201234567 by plain addition.
How this validator works
Enter the number as dialled locally (06 12345678 or 320 1234567) or in full international form (+390612345678 or +393201234567); this tool checks the digit count and prefix against Italy’s real numbering plan using Google’s libphonenumber, entirely client-side. Because Italy is the one major exception to the drop-the-0 rule most countries share, the most common mistake here is stripping that 0 from a landline out of habit — which produces a number that fails validation instead of one that passes it.
What a pass doesn’t tell you
A pass means the number’s shape matches a genuine Italian landline or mobile pattern — it isn’t proof the line is connected or the SIM active. Format validity and current reachability are two different questions.
Scope: catch a wrongly-stripped landline 0, a missing digit, or a malformed mobile prefix before an Italian number reaches a form — not a live connectivity check.
Content last reviewed 2026-07-07.
phone number FAQ
Why does an Italian landline keep its 0 even after +39 is added?
Italy is a rare exception to the usual trunk-prefix rule: the leading 0 on a landline (06 for Rome, 02 for Milan) is treated as part of the subscriber number itself, not a dialling prefix, so it's never dropped — the correct international form is +39 06 12345678, 0 included, not +3961234567.
Do Italian mobile numbers have the same leading-0 rule?
No. Mobile numbers start with 3 (3XX) and never had a leading 0 in the first place, so there's nothing to keep or drop — a mobile written as 320 1234567 becomes +393201234567 by simple addition.
Does a valid Italian number check confirm it's currently active?
No. It only confirms the digits match a real Italian landline or mobile pattern under AGCOM's numbering plan — not that the SIM is topped up or the line connected, which needs a carrier-side check this tool doesn't perform.