Area Code 237 – Puebla
The phone area code for Puebla is 237 (international format +52237). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 237
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Puebla
Geographic Overview
The +52 237 area code is a geographic National Destination Code (NDC) assigned to the state of Puebla, Mexico. Specifically, it covers the northern and central regions of the state, including municipalities such as Acatlán de Osorio, Petlalcingo, and San Pedro Yeloixtlahuaca. This area is part of the Sierra Mixteca Poblana, a region characterized by its rugged terrain and rich indigenous heritage. The code serves both urban centers and rural communities, providing essential telecommunication services to residents and businesses.
Dialing Formats
When dialing a number within the 237 area code, callers must follow the appropriate format depending on their location:
- Local calls (within the same area code): Dial the 7-digit local number directly. For example, to reach a local subscriber, dial XXX-XXXX.
- National long-distance calls (from other Mexican area codes): Dial the long-distance prefix 01, followed by the area code 237 and the 7-digit local number. Example: 01 237 XXX-XXXX.
- International calls (from outside Mexico): Dial the international access prefix (e.g., 011 from the US/Canada), then Mexico's country code 52, followed by the area code 237 and the 7-digit local number. Example: +52 237 XXX-XXXX.
Note that the total number of digits after the country code is 10, including the area code. The local number length is 7 digits, which is standard for geographic numbers in Mexico.
Administrative and Regulatory Context
Area code 237 is managed by the Instituto Federal de Telecomunicaciones (IFT), Mexico's telecommunications regulatory body. It is part of the national numbering plan under ITU-T E.164. The code is assigned to fixed-line services, including PSTN and VoIP, and is not portable to mobile numbers. However, number portability allows users to retain their fixed-line number when changing service providers within the same geographic area.
Caller Instructions
For local callers within the 237 area, simply dial the 7-digit number. For callers from other parts of Mexico, you must include the national long-distance prefix 01. For international callers, always use the plus sign (+) or the appropriate international prefix, followed by 52 and 237. Be mindful that mobile numbers in Mexico use different prefixes (e.g., 222, 221) and are not part of this geographic code.
When calling from abroad, ensure you have the correct country code and area code to avoid misdialing. For example, a call to a business in Acatlán would be dialed as +52 237 XXX-XXXX from any international location.