Area Code 639 – Chihuahua
The phone area code for Chihuahua is 639 (international format +52639). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 639
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Chihuahua
Geographic Coverage and Jurisdiction
The area code 639 is a geographic National Destination Code (NDC) assigned to the northern-central region of the state of Chihuahua, Mexico. This code serves municipalities including Camargo, Delicias, Jiménez, and Meoqui, as well as surrounding rural communities. The region is an important agricultural and commercial hub, with Delicias being the largest city within this code. Administratively, the code falls under the jurisdiction of the Mexican Federal Telecommunications Institute (IFT) and is allocated for fixed-line PSTN services, though some local carriers may offer VoIP-based fixed lines with the same geographic numbering.
Dialing Formats and Caller Instructions
For callers within Mexico, the national long-distance format requires dialing the prefix 01 followed by the area code and the local 7-digit subscriber number. For example, to call a fixed line in Delicias, you would dial 01 639 123 4567. For international callers, the format is +52 639 123 4567 (or 011 52 639 123 4567 from the US/Canada). When dialing locally within the same area code, the 10-digit national number (including area code) is still required in most cases, as Mexico uses a closed numbering plan. There is no overlay code in this region, so the 639 code is unique to the area.
Numbering and Routing Considerations
Subscriber numbers within the 639 code are 7 digits long, making the complete national significant number (NSN) 10 digits when including the area code. The code is exclusively geographic, meaning that the number is tied to a physical location and cannot be ported outside the region. However, number portability is available among fixed-line operators within the same area code. For emergency services, callers should dial 911 regardless of the area code. For business or residential users, it is essential to include the area code when publishing contact numbers to ensure proper routing from mobile or VoIP networks.
Practical Examples for Callers
- Local call within Delicias: 639 123 4567 (if supported) or 01 639 123 4567 for long-distance.
- Call from Mexico City to Delicias: 01 639 123 4567.
- Call from the United States to Delicias: 011 52 639 123 4567 or +52 639 123 4567.
- Call from a mobile phone in Mexico: 01 639 123 4567 (or just the 10-digit number if your carrier supports it).