Dialing an Italian number from France or any other country requires mastering a particularity that few area codes share: the initial zero of the area code is retained after the +39. This rule, a frequent source of errors, distinguishes the Italian numbering plan from that of most European countries. Measuring the difference between dialing a call to Italy and to other destinations helps to understand why so many calls fail.
Italian numbers compared to European formats: length and structure
The E.164 numbering plan, managed by the International Telecommunication Union (ITU), assigns Italy the code +39 with a number length ranging from 3 to 12 digits after the country code. This range is among the widest in Europe.
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| Country | Code | Initial zero retained after the code | Variable number length |
|---|---|---|---|
| Italy | +39 | Yes | Yes (3 to 12 digits) |
| France | +33 | No (the 0 is removed) | No (10 fixed digits) |
| Spain | +34 | No initial 0 | No (9 fixed digits) |
| Germany | +49 | No (the 0 is removed) | Yes (variable) |
Italy shares with Spain the absence of removal of the local prefix, but for a different reason. In Italy, the zero is an integral part of the national number. Removing it results in a complete failure to connect.
To fully understand the +39 code and its usage, it is important to note that this retention of the zero applies only to landlines. Italian mobile numbers start with 3 (not 0), which eliminates any ambiguity for this category.
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Italian area codes: a telephone map of the territory
The first digits after the +39 reveal the nature of the service. The Italian plan organizes its numbers by service category, according to AGCOM’s document (resolution n. 52/12/CIR).
- Numbers starting with 0 designate geographic lines: 02 for Milan, 06 for Rome, 041 for Venice, 055 for Florence. The length of the area code varies from 2 to 4 digits depending on the size of the city.
- Numbers starting with 3 correspond to mobiles and personal services. They generally consist of 10 digits in total after the +39.
- Numbers starting with 8 group special services: toll-free numbers (800), premium-rate services (892, 899), and assistance services.
This structure means that the total length of an Italian number fluctuates. A Roman landline number is written +39 06 XXXX XXXX, while a fixed number in a small municipality may have a 4-digit area code followed by fewer local digits. In France, all numbers are 10 digits long without exception. In Italy, this uniformity does not exist.
Retaining the zero: the rule that traps the French
A reflex acquired in France is to remove the initial 0 when dialing a number with the country code. To call a French landline from abroad, one dials +33 1 XX XX XX XX (the 0 from 01 disappears).
Applying this reflex to Italy causes the call to fail. To reach a Roman number, one must dial +39 06 XXXX XXXX and not +39 6 XXXX XXXX. This difference is the primary cause of international call failures to Italy reported by operators.
Roaming in Italy: what the European regulation changes for +39
The European regulation “Roam-like-at-home” has changed the game for French travelers in Italy. A French subscriber traveling in Italy can call a local number in +39 without extra charges, provided their plan includes calls within the European Union.
In practice, a French person in Italy dials +39 followed by the full number, and the call is counted as a national call from their plan. No additional roaming fees, no need to buy a local SIM card for short stays.
However, a call made from France to an Italian number in +39 remains an international call. The billing then depends on the subscribed plan. Most French mobile plans today include calls to EU landlines and mobiles, but some entry-level offers exclude them.
Calls from Italy to France
The scheme reverses for an Italian resident calling France. The Italian international exit code is 00, followed by the French country code +33. The full number is thus composed: 00 33 X XX XX XX XX (the initial French 0 is removed, in accordance with the French rule).
Italian numbers and risks of fraudulent calls in 0039
Incoming calls displaying a number starting with 0039 deserve particular vigilance. Spoofing techniques can mask the true origin of a call behind a legitimate Italian code.
Several signals should raise alarms:
- A brief call (one or two rings) from an unknown 0039 number, intended to prompt a callback to a premium-rate number.
- A number in +39 followed by a prefix that does not correspond to any known area code (neither 0X nor 3X): the ranges 4 and 5 of the Italian plan are reserved for specific services (SMS/MMS, nomadic communications), not for standard voice calls.
- A caller requesting personal information while presenting themselves as an Italian telephone operator.
Never call back an unknown number in 0039 without prior verification remains the basic precaution. Legitimate Italian numbers starting with 8 (800, 892, 899) are generally not reachable from abroad, which is an additional clue if one receives a call supposedly made from such a number.
The structure of the Italian numbering plan, with its retained zero and variable lengths, makes verification less intuitive than for a French number. Keeping a list of the main area prefixes (02, 06, 041, 055, 051, 011) handy allows for quick filtering of incoming calls in +39 and distinguishing a Milanese call from a suspicious number.