Area Code 779 – Tizayuca, HGO

Geographic Coverage and Administrative Jurisdiction

The area code 779 is a geographic National Destination Code (NDC) assigned to the municipality of Tizayuca, located in the state of Hidalgo (HGO), Mexico. This code serves the urban and peri-urban areas of Tizayuca, including its administrative seat and surrounding localities. Tizayuca is part of the greater Mexico City metropolitan area, which influences its economic and demographic profile. The code is administered under the national numbering plan of Mexico, regulated by the Instituto Federal de Telecomunicaciones (IFT).

Primary Cities and Localities Served

Beyond the city of Tizayuca itself, the 779 code covers adjacent communities such as Huitzila, El Carmen, and Emiliano Zapata, among others. These areas are primarily residential and industrial, with a growing population due to their proximity to Mexico City and the State of Mexico. The code is used for both fixed-line and mobile services, although mobile numbers are often portable and may not retain the original geographic assignment.

Dialing Formats and Procedures

For local calls within the 779 area, callers must dial the 3-digit area code followed by the 7-digit local number, even for calls within the same city. This is a requirement under Mexico's dialing plan since 2019, which eliminated the need to dial '01' for long-distance calls. For example, a local call to a fixed line would be dialed as 779 123 4567.

For international callers, the format is +52 779 123 4567. The country code for Mexico is +52, and the leading '0' is not used. When calling from a mobile phone within Mexico to a 779 number, the same format applies: dial 779 followed by the local number. For calls from abroad, replace the '+' with the international access code of the originating country (e.g., 011 from the US).

Overlay and Numbering Considerations

Currently, there is no overlay code for the 779 area; it is the sole area code for Tizayuca. However, due to the proximity to Mexico City, some numbers may be assigned to mobile operators and could be ported from other regions. Callers should be aware that mobile numbers in Mexico are non-geographic and can be identified by their prefix, but portability means that a number with a 779 prefix may no longer be physically located in Tizayuca. For fixed lines, the geographic correlation remains strong.

Caller Instructions

For local callers within Mexico: dial 779 + 7-digit number. For long-distance callers within Mexico: dial 779 + 7-digit number (no '01' prefix). For international callers: dial your country's exit code, then 52, then 779, then the 7-digit number. Always verify the number length; Mexican numbers are 10 digits including the area code.