Area Code 2643 – San Juan, San Juan

Overview of Area Code 2643

Area code 2643 is a geographic National Destination Code (NDC) within the Argentine telephone numbering plan, assigned to the San Juan Province, specifically serving the city of San Juan and its surrounding metropolitan area. As part of the ITU-T E.164 numbering framework, this code is used for routing calls to fixed-line (PSTN) subscribers within this region. The code is administered by the Ente Nacional de Comunicaciones (ENACOM), Argentina's national regulatory authority.

Geographic Coverage and Jurisdiction

The 2643 area code covers the Gran San Juan metropolitan area, which includes the capital city of San Juan and adjacent departments such as Rivadavia, Chimbas, Santa Lucía, and Rawson. This region is located in the Cuyo area of western Argentina, near the Andes mountains. The code serves both residential and business fixed-line customers within this jurisdiction.

Dialing Formats

Understanding the correct dialing format is essential for both domestic and international callers.

• Domestic calls (within Argentina): When calling a number in San Juan from another province, you must dial the trunk prefix 0, followed by the area code 2643, and then the subscriber number (typically 7 digits). For example, to call a fixed line in San Juan with subscriber number 4567890, you would dial: 0 2643 4567890.
• Local calls (within the same area code): If you are already within the 2643 area, you can usually dial just the 7-digit subscriber number without the area code or trunk prefix. For instance: 4567890.
• International calls (from outside Argentina): To reach a number in San Juan from abroad, you need to dial your country's international access code (e.g., 011 from the US, 00 from many European countries), followed by Argentina's country code 54, then the area code 2643 (without the leading 0), and finally the subscriber number. For example, from the US: 011 54 2643 4567890.

Overlay and Numbering Considerations

As of the latest ENACOM updates, there is no overlay code for the 2643 area. However, due to increasing demand, ten-digit dialing (including the area code) is mandatory for all calls, even local ones, when using mobile phones. Fixed-line local calls may still be completed with seven digits, but it is recommended to always include the area code for clarity and to support number portability.

Caller Instructions

• For local callers: If you are within the 2643 area, you can dial the local number directly. For calls from other Argentine provinces, always include the trunk prefix 0 and the area code.
• For international callers: Always drop the leading 0 of the area code when dialing from abroad. Ensure you have the correct international exit code for your country.

This area code is part of Argentina's geographic numbering plan, and its use is strictly tied to the physical location of the fixed-line service. For any changes or updates, consult ENACOM's official resources.