Area Code 718 – Estado de Mexico

Geographic Coverage and Administrative Jurisdiction

The area code 718 is a geographic National Destination Code (NDC) assigned to the State of Mexico (Estado de Mexico), one of the 32 federal entities of Mexico. This code serves a portion of the state's municipalities, particularly those within the metropolitan influence of Mexico City but outside the federal district's own numbering plan. The State of Mexico is the most populous state in the country, and its telecommunications infrastructure is managed under the national numbering plan administered by the Instituto Federal de Telecomunicaciones (IFT).

Primary Cities and Local Dialing

The 718 area code covers several municipalities, including but not limited to Coacalco de Berriozábal, Tultitlán, Cuautitlán Izcalli, and Atizapán de Zaragoza. These are densely populated urban and suburban areas that form part of the greater Mexico City metropolitan area. For local calls within the same area code, users in Mexico typically dial only the seven-digit local number. However, due to the implementation of the national 10-digit dialing scheme in 2019, all domestic calls within Mexico now require the full 10-digit number, which includes the three-digit area code followed by the seven-digit subscriber number. Therefore, even for local calls, you must dial the area code (718) plus the local number.

International Dialing Format

For callers from outside Mexico, the international format is: +52 718 XXX XXXX, where +52 is the Mexico country calling code, 718 is the area code, and the following seven digits represent the subscriber number. For example, a typical number in this region would be formatted as +52 718 123 4567. When dialing from a foreign country, you must replace the plus sign with the international access prefix of your country (e.g., 011 from the United States and Canada, 00 from many European countries).

Overlay and Numbering Considerations

The 718 area code is part of an overlay complex with other NDCs serving the State of Mexico, such as 55, 56, 59, and others. This means that the same geographic area may have multiple area codes, and the 10-digit dialing rule is mandatory to ensure correct routing. There are no per-call charges for dialing within the same area code or across different area codes within Mexico, as calls are typically included in national calling plans. For mobile users, calls to 718 numbers are treated as national calls, and rates depend on the caller's mobile plan.

Caller Instructions

For local callers within Mexico: dial 718 XXX XXXX (10 digits). For international callers: dial your country's exit code, then 52 718 XXX XXXX. Ensure you omit the leading zero if present in local notation, as Mexico uses the +52 country code and does not use trunk prefixes in international dialing.