Area Code 645 – Cananea, SON
The phone area code for Cananea, SON is 645 (international format +52645). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 645
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Cananea, SON
Geographic Overview
The +52 645 area code is a geographic National Destination Code (NDC) assigned to the city of Cananea, located in the northwestern Mexican state of Sonora. This region is part of the Sonoran Desert and is known for its mining heritage, particularly the Buenavista del Cobre copper mine, one of the largest in the world. The area code serves Cananea and its surrounding localities, including small communities within the municipality. As a geographic code, it is tied to a specific PSTN (Public Switched Telephone Network) exchange area, meaning that the number is associated with a fixed line or a fixed-wireless service registered to that locality.
Dialing Formats
For international callers, the full E.164 format is +52 645 XXX XXXX. For domestic callers within Mexico, the national trunk prefix '01' is used before the area code: 01 645 XXX XXXX. When dialing locally within the same area code, the national format requires the area code to be included, as Mexico uses a closed dialing plan; thus, even local calls must dial the full 10-digit number (645 XXX XXXX).
Number Structure
Numbers under this code consist of 10 digits in total (including the area code), with the subscriber number being 7 digits long. The first digit of the subscriber number is typically 2-9, as numbers starting with 0 or 1 are reserved for special services. This structure is consistent with Mexico's national numbering plan.
Overlay and Regulatory Notes
Currently, there is no overlay code for Cananea; 645 is the sole area code for this region. However, the Federal Telecommunications Institute (IFT) has implemented number portability across Mexico, allowing subscribers to retain their numbers when switching service providers, including between fixed and mobile services, provided the service remains within the same geographic area. This means that a number with the 645 prefix may be served by any licensed carrier, but the geographic association remains.
Caller Instructions
For local callers within Mexico: dial 01 645 followed by the 7-digit subscriber number. For international callers: dial your country's exit code (e.g., 011 from the US/Canada), then 52, then 645, and the 7-digit subscriber number. For example, a typical number might be +52 645 123 4567. Always verify the number length and include the area code, as omitting it will result in a failed call.