Area Code 315 – Jalisco
The phone area code for Jalisco is 315 (international format +52315). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 315
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Jalisco
Overview of Area Code 315 (Jalisco, Mexico)
Area code 315 is a geographic National Destination Code (NDC) assigned to the central-western region of the state of Jalisco, Mexico. It serves a predominantly rural and semi-urban territory, with the city of Ciudad Guzmán (officially Zapotlán el Grande) as its principal urban hub. The code covers municipalities such as Zapotlán el Grande, Gómez Farías, Sayula, Tamazula de Gordiano, and Zapotiltic, among others. This region is known for its agricultural production, dairy industry, and cultural heritage, including the annual cultural festival in Ciudad Guzmán.
As a geographic code, 315 is tied to the PSTN (Public Switched Telephone Network) and is used for both fixed-line and, in some cases, nomadic VoIP services that register to the area. However, it is not assigned to mobile services, which use the non-geographic mobile prefixes (e.g., 33, 55, 1 followed by the area code) under Mexico's numbering plan.
Dialing Formats and Usage
When dialing a number in area code 315 from within Mexico, the national long-distance format is used: 01 315 XXX XXXX. The leading '01' is the national long-distance prefix. For example, to call a fixed line in Ciudad Guzmán, you would dial 01 315 123 4567.
From outside Mexico, callers must dial the international access prefix (e.g., 00 from most countries, or + from mobile phones), followed by Mexico's country code 52, then the area code and the local number: +52 315 123 4567. Note that the national long-distance prefix '01' is not included when dialing from abroad.
Within the same area code, local calls are made using the 7-digit subscriber number alone (e.g., 123 4567). However, due to the expansion of the numbering plan, some areas may require 10-digit dialing even for local calls; always verify with your service provider.
Overlays and Numbering Plan Considerations
As of the latest ITU-T E.164 national numbering plan updates, area code 315 does not have an overlay code. The Mexican Federal Telecommunications Institute (IFT) has not introduced an overlay for this region, meaning that the 10-digit number format (area code + 7-digit subscriber number) is the standard for all calls, including local, to ensure uniformity and future-proofing. This aligns with the national transition to 10-digit dialing across the country.
For businesses and residents, it is essential to use the full 10-digit number for all calls, even within the same area, to avoid misdialing and to comply with national regulations. This practice also facilitates number portability, allowing users to switch between fixed-line providers while retaining their number.
In summary, area code 315 serves a defined geographic region in Jalisco, and understanding the correct dialing procedures is crucial for effective communication with this area.