Area Code 591 – Estado de Mexico

Overview of Area Code 591 in Mexico

Area code 591 is a geographic National Destination Code (NDC) assigned to the State of Mexico (Estado de Mexico), one of the 32 federal entities of Mexico. This code serves the northern and central portions of the state, including the municipalities of Toluca, Metepec, Lerma, Zinacantepec, and San Mateo Atenco. It is important to note that this area code is distinct from the 55 code used in Mexico City and the 722 code that also serves parts of Toluca. The 591 code is part of the national numbering plan administered by the Instituto Federal de Telecomunicaciones (IFT) and follows the ITU-T E.164 standard.

Geographic Coverage and Dialing Formats

The 591 area code covers a mix of urban and semi-rural areas, with Toluca being the largest city and the capital of the state. Other notable localities include Metepec, known for its colonial architecture, and Lerma, an industrial hub. When dialing a number within the same area code, local calls are made using the 8-digit subscriber number alone. For example, to call a business in Toluca from another phone in Toluca, you would simply dial 1234 5678.

For calls originating from outside the 591 area but still within Mexico, you must dial the long-distance prefix '01', followed by the area code and the subscriber number. For instance, from Mexico City, you would dial 01 591 1234 5678. For international callers, the format is: +52 591 1234 5678. The plus sign represents the international access code, which varies by country (e.g., 011 from the US and Canada).

Overlays and Numbering Changes

Currently, there is no overlay code for 591, meaning that the area code is not shared with another NDC in the same geographic region. However, as demand for telephone numbers grows, the IFT may introduce overlays or other measures. It is advisable for businesses to ensure their numbers are portable and to update their contact information if any changes occur.

Caller Instructions

For local callers within the 591 area, simply dial the 8-digit number. For national callers outside the area, use the '01' prefix. For international callers, use the country code 52, then 591, followed by the local number. Always verify the number length: after the area code, the subscriber number is 8 digits long.

Understanding the correct dialing format is crucial for both personal and business communications. Whether you are a resident, a traveler, or a company establishing a presence in Estado de Mexico, adhering to these guidelines ensures seamless connectivity.