Telephone numbers in Mexico

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Telephone numbers in Mexico
ContinentNorth America
Access codes
Country code52

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 (Plan Técnico Fundamental de Numeración) on May 11, 2013.[1] The plan establishes a uniform ten-digit telephone number format. It took effect on August 3, 2019.[2]

Telephone number format[edit]

All telephone numbers in Mexico have ten digits, of which the first identifies one of the eight principal geographic regions of the country.

Map of principal geographic codes in Mexico
Prefix Region
2 East
3 West
4 North
5 Center (Mexico City metropolitan area)
6 Northwest
7 South
8 Northeast
9 Southeast

The national number is formed by prefixing the previously existing local number format with an area code.[2] All ten digits must be dialed for all calls.

Dialing prefixes[edit]

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[edit]

Destinations in Mexico are dialed from foreign location by dialing the foreign country's International access code (011 in the US, 00 in many other countries), the country code 52, and the ten-digit national telephone number of the destination.


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).[3] 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 arrangement using NANP area codes 903 (northwest Mexico) and 905 (Mexico City) from the US into Mexico,[4] 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.[5][6]

Area codes[edit]

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 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, Veracruz
771 Pachuca, Hidalgo
981 Campeche, Campeche
899 Reynosa, Tamaulipas
868 Matamoros, Tamaulipas

Dialing prefixes prior to 2019[edit]

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[edit]

# 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[edit]


  1. ^ "AGREEMENT whereby the Plenary of the Federal Institute of Telecommunications modifies the Fundamental Technical Plans for Numbering and Signaling, as well as what refers to the Number Portability Rules". DIaro Official de la Federación. SEGOB. 2018-05-11. Retrieved 2022-12-14.
  2. ^ a b "El Pleno del IFT aprobó los índices y parámetros de calidad del servicio móvil y aprobó los nuevos Planes de Numeración y Señalización (Comunicado 149/2017)". Instituto Federal de Telecomunicationes. IFT. Retrieved 2022-12-14.
  3. ^ AT&T, Notes on Distance Dialing (1975) p.10-4
  4. ^ CED., Volume 20, Issues 8-13, page 72
  5. ^ Phone System Changes Kill 2 of Mexico’s Area Codes, Los Angeles Times, January 31, 1991
  6. ^ Telecommunications Reports, Volume 57, Issues 1-26, page 46

External links[edit]