Area Code 660 – Culiacan
The phone area code for Culiacan is 660 (international format +52660). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 660
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Culiacan
Geographic Overview
The area code 660 is a geographic National Destination Code (NDC) assigned to the city of Culiacán, the capital of the state of Sinaloa, Mexico. This code serves the municipality of Culiacán and its surrounding metropolitan area, including key localities such as Costa Rica, El Dorado, and Sanalona. Culiacán is a major economic and cultural hub in northwestern Mexico, known for its agricultural production, manufacturing, and services sector. The 660 code was introduced as an overlay to the previous 667 code, which still serves other parts of Sinaloa. As a result, local calls within the Culiacán area may require 10-digit dialing (area code + local number) even for nearby numbers, depending on the specific telephone exchange.
Dialing Formats
For callers within Mexico, dialing a Culiacán number requires the national long-distance prefix '01', followed by the area code 660 and the 7-digit local number. For example, to call a landline in Culiacán from Mexico City, you would dial: 01 660 XXX XXXX. For international callers, the format is: +52 660 XXX XXXX (or 011 52 660 XXX XXXX from the US/Canada). It is important to note that the Mexican numbering plan uses a 10-digit national number, and the area code is not separated by a trunk prefix when dialing from abroad.
Local vs. International Calls
When placing a local call within the 660 area code, you may need to dial the full 10-digit number (660 + 7-digit local number) if your telephone service provider requires it, especially for mobile or VoIP lines. Traditional landline-to-landline calls within the same exchange might still allow 7-digit dialing, but this is becoming less common. For international callers, always use the plus sign (+) or the appropriate international access code (e.g., 011 from the US) followed by the country code 52, then the area code 660, and the local number. Remember to omit any leading '0' that might be used for domestic long-distance calls.
Regulatory and Technical Notes
The 660 area code is regulated by the Instituto Federal de Telecomunicaciones (IFT) in Mexico. It is a geographic code, meaning that the number is tied to a physical location, although number portability allows users to keep their number when moving within the same geographic area. The code supports both fixed-line and mobile services, but mobile numbers in Culiacán may also use other NDCs such as 667 or 668, depending on the carrier and the date of number assignment. For businesses, having a 660 number establishes a local presence in Culiacán, which can be beneficial for customer trust and local marketing.