Area Code 423 – Michoacan
The phone area code for Michoacan is 423 (international format +52423). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 423
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Michoacan
Geographic Overview and Jurisdiction
The area code 423 is a geographic National Destination Code (NDC) assigned to the state of Michoacán de Ocampo, located in southwestern Mexico. This code serves the central and northern portions of the state, with its primary hub in the city of Morelia, the state capital. Other significant municipalities covered by this code include Pátzcuaro, Zacapu, Quiroga, and Santa Clara del Cobre. The region is known for its colonial heritage, indigenous Purépecha culture, and the famous Monarch Butterfly Biosphere Reserve, which attracts both national and international visitors.
Dialing Formats and Caller Instructions
For callers within Mexico, the local dialing format for numbers in the 423 area code is 423 XXX XX XX, where the prefix is dialed directly followed by the seven-digit local subscriber number. For international callers, the full E.164 format must be used: +52 423 XXX XX XX. When calling from a foreign country, dial the international access prefix (e.g., 011 from the US/Canada), followed by Mexico's country code 52, then the area code and local number. For example, to call a business in Morelia from the United States, you would dial 011 52 423 123 45 67. It is important to note that when dialing within Mexico from a mobile phone, the long-distance prefix '01' is no longer required for domestic calls; simply dial the 10-digit number (area code + local number).
Regulatory and Technical Considerations
The 423 area code is regulated by the Instituto Federal de Telecomunicaciones (IFT), Mexico's telecommunications authority. As a geographic code, it is tied to the PSTN infrastructure, but numbers can be ported to mobile or VoIP services, meaning the geographic association does not guarantee the caller's physical location. The numbering plan follows the ITU-T E.164 recommendation, with a total length of 10 digits for national significant numbers (NDC + subscriber number). No overlay code has been assigned to this region, so the 423 code remains the sole area code for its coverage area. For businesses, having a local 423 number can enhance trust and accessibility for customers in Michoacán, especially for those operating in tourism, agriculture, and local commerce sectors.