Area Code 599 – Estado de Mexico

Overview of Area Code 599 (Estado de Mexico)

Area code 599 is a geographic National Destination Code (NDC) assigned to the Estado de Mexico (State of Mexico), one of the 32 federal entities of Mexico. This code serves a portion of the state that is not part of the Mexico City metropolitan area, covering municipalities such as Amecameca, Atlautla, Ayapango, Chalco, Cocotitlan, Ecatzingo, Ixtapaluca, Juchitepec, Ozumba, Temamatla, Tenango del Aire, Tepetlixpa, Tlalmanalco, and Valle de Chalco. These areas are located to the southeast of Mexico City, within the eastern part of the State of Mexico.

Geographically, the region is characterized by a mix of urban and semi-rural communities, with the Chalco Valley being a significant economic and population center. The code is administered under the Mexican numbering plan, which follows the ITU-T E.164 standard. The full international dialing format for numbers in this area is +52 599 XXX XX XX, where the national significant number (NSN) is 10 digits: the NDC (599) followed by a 7-digit subscriber number.

Dialing Procedures

For callers within Mexico, dialing a number in area code 599 requires the long-distance prefix 01 before the NDC. For example, to call a landline in Chalco from another part of Mexico, you would dial 01 599 XXX XX XX. For international callers, the process is to dial the international access code (e.g., 011 from the US/Canada), followed by Mexico's country code 52, then the area code and subscriber number: +52 599 XXX XX XX.

It is important to note that Mexico has implemented overlay codes in many regions to increase numbering capacity. However, as of the latest data, area code 599 does not have an overlay; the code is used exclusively for the geographic area described. Calls to mobile numbers in Mexico are dialed differently: mobile numbers begin with a 2-digit prefix (e.g., 55, 56, etc.) and are dialed as +52 1 XX XXX XX XX for international callers, but this does not apply to fixed-line numbers in 599.

Regulatory and Technical Notes

The Federal Telecommunications Institute (IFT) regulates numbering resources in Mexico. Area code 599 is part of the geographic numbering scheme, meaning that the number is tied to a physical location. This is distinct from non-geographic codes used for mobile, toll-free, and VoIP services. When calling from abroad, it is essential to omit the leading 0 that is used for domestic long-distance dialing. For example, a number written as 01 599 123 45 67 domestically becomes +52 599 123 45 67 internationally.

For businesses and individuals in the region, having a local presence with a 599 number is often advantageous for building trust with local customers. However, with the rise of VoIP and mobile services, many users opt for non-geographic numbers for flexibility. Nonetheless, area code 599 remains a reliable identifier for the eastern State of Mexico.