Area Code 778 – Hidalgo
The phone area code for Hidalgo is 778 (international format +52778). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 778
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Hidalgo
Overview of Area Code 778 (Hidalgo, Mexico)
Area code 778 is a geographic National Destination Code (NDC) assigned to the state of Hidalgo, Mexico, under the country calling code +52. It serves the capital city of Pachuca and its metropolitan area, as well as surrounding municipalities within the state. This code is part of the North American Numbering Plan (NANP) structure adapted for Mexico, but it follows the ITU-T E.164 international dialing format.
Geographic Coverage and Jurisdiction
The 778 area code covers the eastern-central region of Mexico, specifically the state of Hidalgo. Key cities and towns within this code include Pachuca (the state capital), Mineral de la Reforma, Actopan, Tula de Allende, and Tulancingo. The jurisdiction falls under the Federal Telecommunications Institute (IFT) of Mexico, which regulates numbering resources. The code is geographically allocated, meaning that numbers are tied to a physical location, although fixed-line services may be migrated to VoIP infrastructure while retaining the same area code.
Dialing Formats and Instructions
For local calls within the 778 area code, callers in Mexico can dial the 7-digit subscriber number directly (without the area code) when calling from a landline within the same local exchange area. However, for calls from mobile phones or from outside the local area, the full national format is required: 01 778 XXX XXXX (where 01 is the national long-distance prefix). For international callers, the format is +52 778 XXX XXXX. For example, to call a fixed line in Pachuca from the United States, you would dial +52 778 123 4567.
It is important to note that Mexico has implemented an overlay and number homogenization plan. As of August 2019, all calls within Mexico, including local calls, require the 10-digit national number (area code + subscriber number) when dialed from mobile phones. Landline-to-landline local calls may still use 7-digit dialing, but this is being phased out. Callers should verify with their service provider.
Caller Instructions
- Local callers (within 778): Dial the 7-digit number if using a landline; otherwise, dial 778 + 7-digit number.
- National callers (outside 778): Dial 01 778 XXX XXXX.
- International callers: Dial your country's exit code (e.g., 011 from the US), then 52 778 XXX XXXX.
Overlay and Numbering Considerations
Currently, there is no overlay area code for 778, meaning it is the sole code for the region. However, due to increasing demand, the IFT may introduce an overlay in the future. Number portability is available for fixed lines, allowing users to retain their numbers when changing providers. When dialing, always include the area code for calls from mobile phones to ensure proper routing.