Area Code 829 – Nuevo Leon
The phone area code for Nuevo Leon is 829 (international format +52829). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 829
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Nuevo Leon
Geographic Coverage and Administrative Jurisdiction
The +52 829 area code is a geographic National Destination Code (NDC) assigned to the state of Nuevo León, Mexico. It serves the northern region of the country, with its primary service area encompassing the Monterrey metropolitan area, including the municipalities of Monterrey, San Pedro Garza García, Santa Catarina, Guadalupe, San Nicolás de los Garza, Apodaca, and Escobedo. The code is administered under the jurisdiction of the Federal Telecommunications Institute (IFT) and is allocated for fixed-line PSTN services, although some VoIP providers may also route numbers under this code.
Dialing Formats and Caller Instructions
For local callers within Mexico, dialing a number in the 829 area code requires the national long-distance prefix '01' followed by the area code and the seven-digit local number. For example, to call a fixed line in Monterrey from Mexico City, you would dial: 01 829 XXX XXXX. For international callers, the format is the country code for Mexico (+52), followed by the area code and the local number, omitting the '01' prefix. Thus, a call from the United States would be: +52 829 XXX XXXX. It is important to note that when dialing internationally, the leading '0' of the national prefix is not used.
Overlay Considerations and Numbering Changes
The 829 area code is an overlay for the existing 81 area code, which also serves the Monterrey region. This overlay was introduced to meet the growing demand for telephone numbers without requiring existing subscribers to change their numbers. As a result, ten-digit dialing is mandatory for all calls within the overlay area, even for local calls. Callers must always include the area code when dialing any number in the Monterrey metropolitan area. This applies to both fixed-line and mobile calls.
Practical Examples and Usage
For a business in San Pedro Garza García with a number 829 123 4567, a local caller in the same city would dial 829 123 4567 (ten-digit dialing). A caller from Guadalajara would dial 01 829 123 4567, and an international caller from Canada would dial +52 829 123 4567. This area code is primarily used for residential and business fixed lines, and it is not associated with mobile services, which typically use the 81 mobile prefix or other non-geographic codes.