Area Code 621 – Chihuahua
The phone area code for Chihuahua is 621 (international format +52621). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 621
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Chihuahua
Overview of Area Code 621
Area code 621 is a geographic numbering plan area (NPA) within the Mexican national numbering plan, administered under the ITU-T E.164 standard. It serves the western portion of the state of Chihuahua, encompassing the municipalities of Guachochi, Batopilas, Morelos, and parts of the Sierra Tarahumara. The principal city associated with this code is Guachochi, a key commercial and cultural hub for the region. Other notable towns include Creel, a gateway to the Copper Canyon, and San Juanito, both of which are important for tourism and local trade.
Dialing Formats and Procedures
For callers within Mexico, the national long-distance format is used: dial the long-distance prefix 01, followed by the area code 621, and the seven-digit local number. For example, to call a landline in Guachochi from Mexico City, you would dial 01 621 123 4567.
For international callers, the format is: +52 621 123 4567. The plus sign represents the international access prefix, which varies by country (e.g., 011 from the US/Canada). It is crucial to omit the leading '0' when dialing from abroad.
Geographic Coverage and Administration
Area code 621 is assigned to the state of Chihuahua, which borders the United States to the north. The region is characterized by rugged mountainous terrain and is part of the Sierra Madre Occidental. The code covers a sparsely populated area compared to major urban centers, and as such, the number of active lines is relatively low. The Federal Telecommunications Institute (IFT) oversees the allocation and management of this code, ensuring compliance with national numbering regulations.
Caller Instructions
Local callers within the same area code can dial the seven-digit number directly without the area code. However, for calls from other parts of Mexico, the full national format is required. For foreign callers, it is essential to use the country code +52 and the area code 621, followed by the local number. Be aware that mobile numbers in Mexico are also ten digits and typically begin with a '1' after the area code, but this does not apply to landlines in this area.
In recent years, there have been no overlay plans for area code 621, meaning that the current seven-digit numbering remains in effect. However, as demand grows, the IFT may introduce additional area codes or overlay plans in the future. For the most current information, consult the official IFT numbering registry.