Area Code 668 – Sinaloa
The phone area code for Sinaloa is 668 (international format +52668). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 668
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Sinaloa
Overview of Area Code 668 (Sinaloa, Mexico)
Area code 668 is a geographic National Destination Code (NDC) assigned under Mexico's country calling code +52, serving the central-southern portion of the state of Sinaloa. It covers the municipalities of Culiacán, Navolato, and El Dorado, with the primary city being Culiacán Rosales, the state capital and its largest urban center. The code also serves surrounding communities such as Costa Rica, Villa Juárez, and Campo Gobierno, as well as rural areas within these municipalities.
Geographic Coverage and Administrative Jurisdiction
The 668 area code is administered by the Instituto Federal de Telecomunicaciones (IFT) and allocated to the state of Sinaloa. It is used exclusively for fixed-line (PSTN) and fixed-wireless services, including those provided by major carriers like Telmex, Totalplay, and Megacable. Unlike mobile prefixes, 668 is tied to a physical location, meaning that calls to numbers with this code are routed to the Culiacán metropolitan area and its environs.
Dialing Formats and Instructions
For callers within Mexico, dialing a local number in the 668 area code requires the national long-distance prefix (typically '01' for landline-to-landline calls) followed by the area code and the 7-digit local number. For example, to call a fixed line in Culiacán from elsewhere in Mexico, you would dial: 01 668 XXX XXXX. However, if you are calling from a mobile phone within Mexico, you can often omit the '01' and simply dial 668 XXX XXXX.
For international callers, the format is: +52 668 XXX XXXX. For instance, to reach a business in Culiacán from the United States, you would dial +52 668 123 4567. It is crucial to drop the leading '0' of the national prefix when using the international format.
Numbering and Overlay Considerations
Local numbers within the 668 area code are 7 digits long. There is currently no overlay code in this region, so the 668 code is the sole geographic code for the area. However, as demand for fixed lines grows, the IFT may introduce an overlay in the future, which would require 10-digit dialing for all local calls. At present, callers within the same area code can dial the 7-digit number directly without the area code.
Practical Information for Callers
When calling from abroad, be mindful of time zones: Sinaloa operates on Mountain Standard Time (MST) and observes daylight saving time from the second Sunday in March to the first Sunday in November. For business or personal calls, it is advisable to check the local time before dialing. Additionally, some VoIP services may require you to use the international format even for domestic calls, so always verify your service provider's dialing rules.