Area Code 492 – Zacatecas
The phone area code for Zacatecas is 492 (international format +52492). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 492
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Zacatecas
Overview of Area Code 492
Area code 492 is a geographic National Destination Code (NDC) assigned to the state of Zacatecas in central Mexico. It serves the capital city of Zacatecas and its surrounding metropolitan area, including the municipalities of Guadalupe, Morelos, and Vetagrande. This code is part of the Mexican numbering plan under ITU-T E.164, with the full international dialing format +52 492 XXX XXXX.
Geographic Coverage and Administration
The 492 area code covers the central-southern region of the state of Zacatecas, an area characterized by its historic colonial architecture and mining heritage. The primary city, Zacatecas, is the state capital and a UNESCO World Heritage Site. The code also serves nearby towns such as Fresnillo (though Fresnillo has its own code, 493), but the core coverage is centered on the capital. Administratively, the code is regulated by the Instituto Federal de Telecomunicaciones (IFT), Mexico's telecommunications regulatory body.
Dialing Formats and Procedures
For local calls within the 492 area, callers must dial the 3-digit area code followed by the 7-digit local number, even for calls within the same city. This is a mandatory requirement in Mexico's closed dialing plan. For example, to call a landline in Zacatecas from another local number, you would dial 492 XXX XXXX. For international callers, the format is +52 492 XXX XXXX. When calling from a mobile phone within Mexico, the same 10-digit format (492 XXX XXXX) is used, without the need for an additional long-distance prefix.
Numbering and Overlays
As of the latest IFT updates, area code 492 does not have an overlay code, meaning it is the sole NDC for its geographic region. The number length is 10 digits (excluding the country code), and the numbering capacity is sufficient for the region's demand. However, with the growth of telecommunication services, IFT periodically reviews numbering resources to ensure adequate supply.
Caller Instructions
- Local callers: Dial 492 followed by the 7-digit number. Example: 492 123 4567.
- National long-distance callers: Dial 01 492 123 4567 (using the national long-distance prefix 01).
- International callers: Dial your country's exit code, then 52, then 492, then the 7-digit number. Example: from the US, dial 011 52 492 123 4567.
This area code is used for both fixed-line and VoIP services, but it is not assigned to mobile numbers, which use non-geographic codes like 1, 2, or 3 after +52. Understanding these dialing rules ensures seamless connectivity for both residents and visitors to the region.