Area Code 921 – Coatzacoalcos/Ixhuatlan Del Sureste, VER

Geographic Coverage and Administrative Jurisdiction

The Mexican area code +52 921 is a geographic National Destination Code (NDC) assigned to the southern region of the state of Veracruz, specifically serving the municipalities of Coatzacoalcos and Ixhuatlán del Sureste, as well as nearby localities within the same local exchange area. This code is administered under the jurisdiction of the Mexican Federal Telecommunications Institute (IFT) and is allocated exclusively for fixed-line PSTN services, although some carriers may route VoIP traffic over the same numbering resources.

Primary Cities and Coverage Area

The principal city served by this code is Coatzacoalcos, a major industrial port on the Gulf of Mexico and one of the most important economic hubs in the state. Other communities within the coverage area include Ixhuatlán del Sureste, Allende, Mundo Nuevo, and various rural localities. The code covers a compact geographic region, and no overlay codes have been introduced, meaning that +52 921 remains the sole NDC for this area.

Dialing Formats and Caller Instructions

For local callers within the 921 area code, it is necessary to dial the full 10-digit national number, which consists of the three-digit area code followed by a seven-digit subscriber number. For example, a local call to a fixed line in Coatzacoalcos would be dialed as 921 XXX XXXX. For callers from other parts of Mexico, the national long-distance prefix 01 must be added before the area code, resulting in 01 921 XXX XXXX. International callers should dial the Mexican country code +52, followed by the area code and subscriber number, omitting the leading trunk prefix: +52 921 XXX XXXX. It is important to note that when dialing from a mobile phone within Mexico, the same national format applies, but the long-distance prefix may be omitted depending on the carrier; however, the recommended format is to always use the full 10-digit number.

Technical Considerations and Numbering

Subscriber numbers within the 921 code are seven digits long, and the total number length for international dialing is 13 digits when including the country code. The IFT has implemented number portability across fixed and mobile services, allowing users to retain their numbers when switching providers, but the geographic significance of the code remains tied to the original location. For businesses, having a local 921 number establishes a physical presence in the region and can reduce the cost of incoming calls from local customers. For international callers, rates vary depending on the service provider, but calls to this geographic code are typically charged at standard international fixed-line rates.