Area Code 48 – San Luis Potosi
The phone area code for San Luis Potosi is 48 (international format +5248). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 48
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of San Luis Potosi
Overview of Area Code 48 (San Luis Potosí)
Area code 48 is a geographic National Destination Code (NDC) within the Mexican numbering plan, assigned to the state of San Luis Potosí and its surrounding metropolitan area. Under the ITU-T E.164 international standard, the full country calling code for Mexico is +52, so numbers in this region are dialed internationally as +52 48 XXX XXXX. Domestically, callers within Mexico must dial the 10-digit national number (48 XXX XXXX) without the +52 prefix, even for local calls, following the national dialing plan implemented in 2002.
Geographic Coverage and Jurisdiction
The 48 area code serves the municipality of San Luis Potosí, the state capital, along with adjacent municipalities such as Soledad de Graciano Sánchez and Villa de Reyes. This region is an important industrial and commercial hub in central Mexico, home to automotive, manufacturing, and logistics industries. The numbering area is administered by the Federal Telecommunications Institute (IFT) and is allocated to fixed-line services, including PSTN and fixed VoIP lines, though some mobile numbers may also be assigned to this code due to number portability.
Dialing Formats and Instructions
- Local calls (within Mexico): Dial the 10-digit number: 48 XXX XXXX. For example, to call a fixed line in San Luis Potosí, dial 48 123 4567.
- International calls (from abroad): Dial your country's exit code, then 52 (Mexico's country code), then 48 and the local 7-digit number: +52 48 XXX XXXX. For instance, from the US, dial 011 52 48 123 4567.
- Calls from mobile phones in Mexico: Same as local: dial 48 XXX XXXX.
Overlay and Numbering Considerations
Unlike many areas in Mexico, the 48 area code does not currently have an overlay; it remains the sole NDC for the San Luis Potosí geographic region. However, due to mobile number portability, some numbers with the 48 prefix may be assigned to mobile operators, but the prefix itself is not a dedicated mobile code. When dialing, always use the full 10-digit number to ensure proper routing, regardless of the service type.
Caller Guidance
For local callers: simply dial the 10-digit number. For international callers: always include the +52 country code and drop any leading trunk prefix (e.g., '01' for domestic long-distance). This ensures seamless connectivity to businesses and residents in San Luis Potosí.