Area Code 870 – Coahuila/Durango
The phone area code for Coahuila/Durango is 870 (international format +52870). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 870
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Coahuila/Durango
Geographic Coverage and Administrative Jurisdiction
The area code 870 is a geographic National Destination Code (NDC) assigned within the Mexican numbering plan, covering the states of Coahuila and Durango. This code serves a broad region that includes major urban centers such as Torreón (Coahuila) and Gómez Palacio (Durango), which together form the Comarca Lagunera, a significant industrial and agricultural hub. The administrative jurisdiction for this code falls under the Federal Telecommunications Institute (IFT), which regulates numbering resources in Mexico.
Primary Cities and Local Dialing
Key cities within the 870 area code include Torreón, Gómez Palacio, and Ciudad Lerdo, along with surrounding municipalities. For local calls within the same area code, callers in Mexico traditionally dial only the seven-digit subscriber number. However, with the implementation of the National Numbering Plan in 2019, all local calls now require the full ten-digit dialing format (NDC + subscriber number) even for calls within the same area code. This change eliminated the need for the previous '01' prefix for long-distance calls within Mexico.
International Dialing Format
For callers outside Mexico, the international format is +52 870 XXX XXXX, where +52 is the country calling code for Mexico, 870 is the NDC, and the remaining seven digits represent the subscriber number. When dialing from abroad, you must replace the '+' with your country's international access code (e.g., '011' from the US/Canada). For example, a number in Torreón might be dialed as +52 870 123 4567 from a mobile phone or 011 52 870 123 4567 from a US landline.
Overlay and Numbering Considerations
As of the latest IFT updates, the 870 area code does not have an overlay code, meaning it is the sole NDC for this geographic region. However, due to the 2019 reform, all Mexican numbers, including those in 870, are now part of a closed numbering plan, requiring ten-digit dialing for all calls, regardless of distance. This simplifies routing and ensures that mobile and fixed-line numbers are uniformly formatted.
Caller Instructions
- Local callers (within 870): Dial the ten-digit number: 870 XXX XXXX.
- National callers (from other area codes in Mexico): Dial 870 XXX XXXX (no prefix needed).
- International callers: Dial your country's exit code, then 52 870 XXX XXXX.
Understanding these dialing protocols ensures seamless connectivity to businesses and residents in the Coahuila-Durango region.