Area Code 417 – Guanajuato
The phone area code for Guanajuato is 417 (international format +52417). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 417
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Guanajuato
Overview of Area Code 417 (Guanajuato, Mexico)
Area code 417 is a geographic National Destination Code (NDC) assigned to the state of Guanajuato, in central Mexico. It covers a significant portion of the state, including the capital city of Guanajuato and its metropolitan area, as well as surrounding municipalities. This code is part of the Mexican numbering plan, which follows the ITU-T E.164 recommendation, with the country calling code +52.
Geographic Coverage and Administrative Jurisdiction
The 417 area code serves the central and southern regions of Guanajuato, encompassing both urban and rural communities. Key cities and towns within this code include Guanajuato City, Marfil, and other localities in the Sierra de Guanajuato region. The area is known for its historical significance, colonial architecture, and mining heritage, attracting tourism and business activity.
Dialing Formats and Procedures
For local calls within the 417 area code, callers must dial the 7-digit local number preceded by the area code, even for calls within the same city. This is due to Mexico's closed numbering plan, which requires the full 10-digit number (area code + local number) for all calls, including local ones. For example, to call a landline in Guanajuato City, you would dial: 417 XXX XXXX.
For international callers, the format is: +52 417 XXX XXXX. For example, a caller from the United States would dial 011 52 417 XXX XXXX, while a caller from Europe would dial 00 52 417 XXX XXXX.
Overlay Considerations and Numbering Resources
As of the latest updates, area code 417 does not have an overlay. However, the Mexican Federal Telecommunications Institute (IFT) periodically reviews numbering resources to ensure sufficient capacity. If demand increases, an overlay may be introduced, which would require 10-digit dialing (already in place) and would not affect the dialing format for international callers.
Practical Guidance for Callers
When calling from outside Mexico, always replace the leading '0' (if used in domestic long-distance) with the international access code and Mexico's country code +52. For example, a domestic call from Mexico City to Guanajuato would require dialing 01 417 XXX XXXX, but the international format omits the '01' and uses +52 instead. Ensure you have the correct 7-digit local number, as omitting the area code will result in a failed call.