Area Code 763 – Tezontepec de Aldama/Tlahuelilpan, HGO

Geographic Coverage and Administrative Jurisdiction

The area code 763 is a geographic National Destination Code (NDC) assigned within the Mexican numbering plan, covering the municipalities of Tezontepec de Aldama and Tlahuelilpan in the state of Hidalgo (HGO). These localities are part of the Tula-Tepeji subregion, an important industrial and agricultural corridor in the central-southern part of the state. The code serves both fixed-line PSTN subscribers and, in some cases, fixed wireless or VoIP services that are registered under this geographic area.

Primary Cities and Local Dialing

The principal towns served by this code include Tezontepec de Aldama, Tlahuelilpan, and their surrounding communities. For local calls within the same NDC, users typically dial only the seven-digit local number. However, due to the implementation of the “Marco Técnico de Interconexión” and the national dialing simplification, all calls within Mexico now require the full ten-digit format (NDC + subscriber number) even for on-net calls. Therefore, a local call to a fixed line in Tezontepec would be dialed as 763 XXX XXXX from any phone in Mexico, without the need for the long-distance prefix “01”.

International Dialing Format

For callers outside Mexico, the international format requires the country code for Mexico (+52) followed by the area code and the local number. For example, to reach a fixed line in Tezontepec de Aldama, you would dial +52 763 XXX XXXX. It is crucial to omit the leading “0” that was historically used for domestic long-distance calls. This format applies to both PSTN and mobile calls, as Mexico’s numbering plan is fully closed and all numbers are ten digits long.

Overlay and Numbering Considerations

Currently, there is no overlay code for the 763 area; it remains a distinct geographic code. However, as demand for numbers grows, the Federal Telecommunications Institute (IFT) may introduce overlays or reassignments. Users should always verify the complete ten-digit number to avoid misdialing, especially when calling from mobile devices that may automatically add the country code.

Caller Instructions

• Local callers (within Mexico): Dial the ten-digit number: 763 XXX XXXX.
• International callers: Dial your country’s exit code (e.g., 011 from the US/Canada), then 52, then 763, then the seven-digit local number: 011 52 763 XXX XXXX.
• Mobile callers: Always include the area code even when calling from a mobile phone, as all Mexican numbers are ten digits.

This structure ensures reliable routing through the PSTN and interconnected VoIP networks, maintaining service quality for residents and businesses in the region.