Area Code 438 – Michoacan
The phone area code for Michoacan is 438 (international format +52438). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 438
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Michoacan
Overview of Area Code 438
Area code 438 is a geographic numbering plan area (NPA) within the Mexican national numbering plan, assigned to the state of Michoacán. It serves as a National Destination Code (NDC) for fixed-line telephone services in the region, following the ITU-T E.164 international standard. The area code covers the northern and central parts of Michoacán, including the city of Zacapu and surrounding municipalities. This code is used for traditional PSTN (Public Switched Telephone Network) services, as well as for VoIP (Voice over Internet Protocol) lines that are registered to a physical address within the geographic area.
Geographic Coverage and Major Localities
The 438 area code encompasses several municipalities in Michoacán, with Zacapu being the principal city. Other notable localities include Purépero, Chilchota, and Tangancícuaro. These areas are part of the larger Bajío region, known for agricultural production and growing industrial activity. The region is served by a mix of incumbent carriers and competitive local exchange carriers (CLECs), providing both residential and business telephony services.
Dialing Formats and Call Routing
For callers within Mexico, dialing a number in the 438 area code requires the national long-distance prefix '01' followed by the area code and the seven-digit local number. For example, to call a fixed line in Zacapu, you would dial: 01 438 XXX XXXX. For international callers, the format is: +52 438 XXX XXXX. The plus sign (+) represents the international access code, which varies by country (e.g., 011 from the US/Canada). It is important to note that when dialing from a mobile phone in Mexico, the '01' prefix is often replaced by the carrier's long-distance code, but the '438' area code remains essential for routing.
Overlay and Numbering Considerations
Currently, there is no overlay code for the 438 area, meaning that local calls within the same area code do not require an area code when dialed locally. However, if you are calling from a different area code within Mexico, you must include the national long-distance prefix and the area code. The number length is fixed at ten digits for national dialing (including the area code) and eleven digits for international dialing (including the country code).
Caller Instructions
For local callers within the 438 region, simply dial the seven-digit local number. For callers from other parts of Mexico, dial 01 438 followed by the local number. For international callers, dial your country's exit code, then 52, then 438, and the seven-digit local number. Always ensure you have the correct number of digits; local numbers are seven digits, and the complete international format should be +52 438 XXX XXXX.