Area Code 781 – Coyuca de Benitez/San Jeronimo de Juarez, GRO

Overview of Area Code 781 (Mexico)

Area code 781 is a geographic National Destination Code (NDC) assigned to the municipalities of Coyuca de Benítez and San Jerónimo de Juárez, located in the state of Guerrero (GRO), Mexico. This region lies along the Pacific coast, south of the state capital Chilpancingo, and is known for its coastal lagoons, agricultural activity, and fishing communities. The numbering area falls under the ITU-T E.164 country code +52, which is the international dialing prefix for Mexico.

Geographic Coverage and Dialing Formats

The 781 area code serves a predominantly rural and semi-urban territory. Key localities include the municipal seat of Coyuca de Benítez, as well as smaller communities and ranches within the municipalities. For callers within Mexico, the national long-distance format requires dialing the long-distance prefix 01, followed by the area code and the local seven-digit number. For example, a call from Mexico City to a fixed line in Coyuca de Benítez would be dialed as 01 781 XXX XXXX.

For international callers, the format is +52 781 XXX XXXX (or 011 52 781 XXX XXXX when dialing from the United States or Canada). It is important to note that the area code is an integral part of the national number and must be included even when dialing from a mobile phone within Mexico, as the country uses a closed dialing plan for fixed lines.

Local vs. International Caller Instructions

Local callers within the same area code can often dial the seven-digit number directly without the area code, depending on the specific local exchange rules. However, to avoid confusion and ensure connectivity, it is recommended to always use the full national format (01 781 XXX XXXX) when calling from a different area code or from a mobile network. Foreign callers must replace the international access code (e.g., 00, 011, or +) with the appropriate exit code for their country, followed by Mexico's country code 52, the area code 781, and the local number.

Overlay and Numbering Considerations

As of the latest ITU-T and Federal Telecommunications Institute (IFT) updates, area code 781 does not have an overlay. This means that the area code is unique to the geographic region, and no additional area codes share the same numbering plan area. The number length for local subscribers is eight digits in the national format (area code + seven-digit subscriber number). For international calls, the total number of digits after the country code is eight, making the full international number length 11 digits when including the country code.

Businesses and residents in the region should ensure that their telecommunications providers have correctly configured their numbering for both national and international calls. For VoIP or cloud-based phone systems, it is essential to use the correct E.164 format (+52781XXXXXXX) to route calls reliably.