Area Code 722 – Estado de Mexico

Overview of Area Code 722

Area code 722 is a geographic National Destination Code (NDC) assigned to the western portion of the Estado de México (State of Mexico), one of the 32 federal entities of Mexico. This code serves the city of Toluca de Lerdo, the state capital, and its surrounding metropolitan area, including municipalities such as Metepec, Zinacantepec, Lerma, San Mateo Atenco, and Ocoyoacac. Toluca is a major industrial and commercial hub, located approximately 60 kilometers west of Mexico City, and is part of the broader Greater Mexico City megalopolis.

Geographic Coverage and Administrative Jurisdiction

The 722 area code is allocated within the framework of the Plan Técnico Fundamental de Numeración of the Instituto Federal de Telecomunicaciones (IFT), Mexico's telecommunications regulator. It covers a region that is politically and economically significant, hosting the state government, the Autonomous University of the State of Mexico (UAEMéx), and numerous multinational corporations. The numbering area is classified as geographic, meaning that the prefix is tied to a specific physical location and is used for fixed-line (PSTN) services, including traditional copper lines, cable telephony, and fixed wireless access.

Dialing Formats and Caller Instructions

For callers within Mexico, dialing a number in the 722 area code requires the format: 722 XXX XX XX (10 digits total, including the area code). For international callers, the full E.164 format is +52 722 XXX XX XX. To call from abroad, dial the international access prefix (e.g., 011 from the US/Canada), then Mexico's country code 52, followed by the area code and the local 7-digit subscriber number. For example, a local number in Toluca might be 722 123 45 67, which would be dialed as +52 722 123 45 67 from outside Mexico.

It is important to note that Mexico's dialing plan underwent a significant change in 2019, eliminating the need to dial '01' for long-distance calls within the country. Currently, all national calls, whether local or long-distance, require only the 10-digit number (area code + subscriber number). There is no overlay code in this region; 722 remains the sole area code for the Toluca metropolitan area.

Numbering and Services

Numbers under 722 are assigned to both residential and business subscribers. As with all geographic codes in Mexico, the IFT regulates the allocation to carriers, which include major operators like Telmex, Izzi, Megacable, and Totalplay. The subscriber number length is 7 digits, and the total number length is 10 digits (excluding the country code). The area code supports all standard telephony services, including voice, fax, and DSL internet over PSTN lines. Mobile numbers in Mexico are not assigned geographic area codes; they use the non-geographic prefixes 1, 2, 3, 4, 5, 6, 7, 8, and 9 (with 1 being the most common). Therefore, a number starting with 722 is always a fixed-line service, unless it has been ported to a mobile network, which is possible under Mexico's number portability regulations.

Practical Guidance for Callers

When calling a 722 number from a mobile phone in Mexico, simply dial the 10-digit number. From a fixed line, the same applies. For international callers, always include the +52 country code and drop any leading '0' or '1' that might be used in domestic dialing. Be aware that rates for international calls to Mexico vary by carrier; VoIP services often offer lower rates. If you are traveling to the Toluca region, you can use local numbers without any additional access codes. For any assistance, your local telecom provider can clarify dialing procedures.