Area Code 031 – Como
The phone area code for Como is 031 (international format +39031). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 031
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Como
Geographic Coverage and Administrative Jurisdiction
The Italian national destination code (NDC) 031 is a geographic area code assigned to the province of Como, located in the Lombardy region of northern Italy. This numbering area encompasses the city of Como, the provincial capital situated on the southwestern shore of Lake Como, as well as numerous surrounding municipalities and towns within the province. The administrative jurisdiction of the 031 area code aligns with the boundaries of the Province of Como, which includes notable towns such as Cantù, Erba, Mariano Comense, and Olgiate Comasco. The area is characterized by its proximity to the Swiss border, with the city of Lugano lying just north of the border, and it serves as a significant economic and tourist hub.
Dialing Formats and Number Structure
Within Italy, calls to numbers in the 031 area code require dialing the full national significant number (NSN), which includes the trunk prefix 0 followed by the area code and the subscriber number. The NSN for Como numbers is typically 10 digits long, comprising the area code (031) and a 7-digit subscriber number. For example, a local Como number might be formatted as 031 1234567. When dialing from a landline within the same area code, the full 10-digit number must still be dialed, as Italian numbering does not allow abbreviated local dialing. From a mobile phone within Italy, the same 10-digit number is dialed directly.
For international callers, the Italian country code +39 is used, and the leading 0 of the area code is dropped. Thus, the international format becomes +39 31 1234567. Callers from abroad should note that the plus sign (+) represents the international access prefix of their country (e.g., 00 in most European countries, 011 in North America).
Overlay and Numbering Plan Considerations
Currently, there is no overlay code for the Como area; the 031 code serves exclusively the province. However, due to the increasing demand for telecommunication services, the Italian Regulatory Authority (AGCOM) has implemented measures to ensure number portability and the availability of new numbers. Subscribers in the Como area may have migrated to VoIP or other non-geographic services, but the geographic code remains tied to the physical location of the line for traditional PSTN services.
Caller Instructions
- Local callers (within Italy): Dial the full 10-digit number, e.g., 031 1234567.
- International callers: Dial your country's international access prefix, then 39, then 31, followed by the 7-digit subscriber number, e.g., +39 31 1234567.
It is important to verify the subscriber number length, as some older lines may have fewer digits, but the standard is 7 digits after the area code.