Area Code 667 – Sinaloa
The phone area code for Sinaloa is 667 (international format +52667). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 667
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Sinaloa
Geographic Coverage and Administrative Jurisdiction
The area code 667 is a geographic National Destination Code (NDC) assigned to the state of Sinaloa, Mexico, under the national numbering plan administered by the Instituto Federal de Telecomunicaciones (IFT). It serves the central and southern municipalities of the state, including the capital city Culiacán Rosales, as well as Navolato, Costa Rica, and surrounding localities. The code covers both urban and rural areas within these municipalities, providing PSTN and VoIP services to residential and business subscribers.
Dialing Formats and Caller Instructions
For local calls within the 667 area code, users must dial the 8-digit local number (which includes the NDC and the subscriber number). For example, to call a landline in Culiacán, you would dial 667 123 4567. For calls from other area codes within Mexico, the full national long-distance format is required: 01 667 123 4567. International callers should use the country code for Mexico (+52) followed by the area code and subscriber number, omitting the leading '0' used for domestic long-distance: +52 667 123 4567. This format is essential for proper routing through international gateways.
Overlay and Numbering Considerations
Currently, the 667 area code does not have an overlay, meaning it is the sole geographic code for its service area. However, the IFT has implemented number portability across Mexico, allowing subscribers to retain their numbers when switching service providers. This means that a number with the 667 prefix may be served by a different carrier than originally assigned, but the geographic association remains unchanged. For VoIP users, the 667 code is used to provide a virtual presence in the region, enabling businesses to establish local numbers without physical offices.
Practical Information for Callers
When calling from abroad, ensure you have the correct international exit code (e.g., 011 from the US/Canada) before dialing +52 667. For mobile calls within Mexico, it is common to dial the 10-digit number directly (667 123 4567) even for local calls, as mobile networks require the full NDC. Always verify the number length: local numbers in this area code are 8 digits long, including the NDC. For emergency services, dial 911, which is a national emergency number. For directory assistance, use 040 for national information.