Area Code 712 – Estado de Mexico

Geographic Coverage and Administrative Jurisdiction

The +52 712 country calling code and area code combination corresponds to a geographic numbering plan area within the Estado de México (State of Mexico), one of the 32 federal entities of Mexico. This National Destination Code (NDC) serves a predominantly rural and semi-urban region located in the central part of the country, to the northwest of Mexico City. The area covered by the 712 prefix includes the municipalities of Acambay, Aculco, Atlacomulco, El Oro, Jilotepec, Morelos, Polotitlán, Soyaniquilpan de Juárez, Temascalcingo, and Timilpan, among others. The principal city and commercial hub of this region is Atlacomulco, which serves as an administrative and economic center. This NDC is part of the national numbering plan administered by the Instituto Federal de Telecomunicaciones (IFT) in accordance with ITU-T E.164 recommendations.

Dialing Formats and Caller Instructions

For domestic callers within Mexico, the local dialing format for numbers in the 712 area code is 712 XXX XX XX (10 digits total, including the area code). To call from a Mexican mobile or fixed line, you must dial the area code followed by the seven-digit local subscriber number. For international callers, the correct format is +52 712 XXX XX XX, where the plus sign represents the international access prefix (00 in most countries) and 52 is the country code for Mexico. When dialing from abroad, omit any leading zero that may appear in domestic notation. For example, to call a business in Atlacomulco, you would dial +52 712 123 45 67 from any international location. It is important to note that Mexico has implemented an overlay numbering plan in many regions; however, the 712 area code remains a distinct geographic code without an overlay, meaning that all numbers within this region share the same area code and no additional digit is required for local calls.

Numbering and Regulatory Considerations

As a geographic NDC, the 712 prefix is assigned to fixed-line services, including traditional PSTN (Public Switched Telephone Network) and VoIP (Voice over Internet Protocol) services that are registered to a physical address within the covered municipalities. The IFT regulates the allocation of these codes to licensed carriers, and number portability allows subscribers to retain their numbers when changing service providers, provided they remain within the same geographic area. For callers, it is essential to use the correct international format when dialing from abroad to ensure proper routing through the Mexican PSTN. The cost of calling this region varies depending on the caller's location and service provider; international rates typically apply when dialing from outside Mexico.