Telephone numbers in Mexico are regulated by the Federal Telecommunications Institute, an independent government agency of Mexico. The agency published the Fundamental Technical Plan for Numbering () on May 11, 2013. The plan establishes a uniform ten-digit telephone number format. It took effect on August 3, 2019.
Telephone number format All telephone numbers in Mexico have ten digits, of which the first identifies one of the eight principal geographic regions of the country.
Prefix Region 2 East 3 West 4 North 5 Center (Mexico City metropolitan area) 6 Northwest 7 Southwest 8 Northeast 9 Southeast
The national number is formed by prefixing the previously existing local number format with an area code. All ten digits must be dialed for all calls.
Dialing prefixes Since August 3, 2019, only the following dialing prefixes are available for use within Mexico:
Prefix Use Format 00 International direct dialing 00 + country code + local phone number
Dialing into Mexico Destinations in Mexico are dialed from foreign location by dialing the foreign country's International access code (011 within the NANP area, 00 in many other countries), the country code 52, and the ten-digit national telephone number of the destination. As of 2020, the dialing procedure for mobile phones in Mexico no longer requires the inclusion of the number '1' after the country code. The procedure for calling landlines remains unchanged.
History Until August 3, 2019, telephone numbers in Mexico consisted of ten digits with either two-digit area codes (for Mexico City, Monterrey, and Guadalajara and their respective metropolitan areas) or three-digit area codes for the rest of the country. New area codes were assigned in the overlay format to address number exhaustion: in 2017, Toluca and Puebla and in 2018, León, Mexico City, and Tijuana.
In the early development of International Direct Distance Dialing (IDDD), Mexico elected to join World Zone 5, instead of joining the North American Numbering Plan (NANP).AT&T, Notes on Distance Dialing (1975) p.10-4 Since the 1960s, the Bell System had already established technical infrastructure to include Mexico in the NANP routing system, and continued to maintain special dialing arrangements using NANP area codes 903 (northwest Mexico) and 905 (Mexico City) from the US into Mexico,CED., Volume 20, Issues 8-13, page 72 because of high community interest into the 1980s. Use of the area codes was formally discontinued on February 1, 1991, requiring callers to use international dialing.Phone System Changes Kill 2 of Mexico’s Area Codes, Los Angeles Times, January 31, 1991Telecommunications Reports, Volume 57, Issues 1-26, page 46
Area codes Major cities and metropolitan areas have the following codes: Area code City or metropolitan area 55 / 56 Mexico City 81 Monterrey, Nuevo León 33 Guadalajara, Jalisco 656 / 657 Ciudad Juárez, Chihuahua 614 Chihuahua, Chihuahua 618 Durango, Durango 999 / 990 Mérida, Yucatán 221 / 222 Puebla, Puebla 442 / 446 Querétaro, Querétaro 449 Aguascalientes, Aguascalientes 663 / 664 Tijuana, Baja California 612 La Paz, Baja California Sur 624 Los Cabos, Baja California Sur 844 Saltillo, Coahuila 686 Mexicali, Baja California 667 Culiacán, Sinaloa 722 / 729 Toluca, Mexico 998 Cancún, Quintana Roo 871 Torreón, Coahuila 744 Acapulco, Guerrero 444 / 440 San Luis Potosí, San Luis Potosí 833 Tampico, Tamaulipas 477 / 479 León, Guanajuato 961 Tuxtla Gutiérrez, Chiapas 662 Hermosillo, Sonora 633 Agua Prieta, Sonora 645 Cananea, Sonora 644 Cd. Obregón, Sonora 642 Navojoa, Sonora 631 Nogales, Sonora 229 Veracruz, Veracruz 443 Morelia, Michoacán 921 Coatzacoalcos, Veracruz771 Pachuca, Hidalgo981 Campeche, Campeche899 Reynosa, Tamaulipas868 Matamoros, Tamaulipas492 Zacatecas, Zacatecas
Dialing prefixes prior to 2019 Prefix Use Format Digits after prefix 00 International direct dialing 00 + country code + area code + phone number - 01 Domestic direct dialing 01 + area code + phone number 10 02 Domestic operator dialing 02 + area code + phone number 10 09 International operator dialing 09 + country code + area code + phone number - 044 Local cell phone from a land line 044 + area code + phone number 10 - Cell phone from a cell phone area code + phone number 10 045 Domestic cell phone from a land line 045 + area code + phone number 10 - Domestic cell phone from a cell phone area code + phone number 10
Other service numbers # Services 020 Operator-assisted domestic collect call (Telmex) 030 Local time (Telmex) 031 Wake up service 040 Information / directory 050 Phone company hotline 051 Number portability PIN (can be used to determine your own line's phone number) 070 City hotline (not available in some cities) 071 CFE hotline (electric company) 072 [Reporte de Servicios de Ciudad] hotline (Water Troubles, Bad Road, Etc... not available in some cities) 090 Operator-assisted international collect call 911 Emergency telephone number (since 2016)
See also Area codes in Mexico by code
References
External links ITU allocations list