Area Code 429 – Guanajuato
The phone area code for Guanajuato is 429 (international format +52429). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 429
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Guanajuato
Geographic Coverage and Administrative Jurisdiction
The area code 429 is a geographic National Destination Code (NDC) assigned to the state of Guanajuato, in the central-northern region of Mexico. This code serves a cluster of municipalities within the state, primarily including Apaseo el Alto, Apaseo el Grande, Comonfort, Jerécuaro, Salvatierra, Santiago Maravatío, Tarimoro, and Villagrán. The area is characterized by a mix of urban centers and rural communities, with economic activities ranging from agriculture and livestock to manufacturing and commerce. The administrative jurisdiction falls under the Secretariat of Infrastructure, Communications and Transportation (SICT) and the Federal Telecommunications Institute (IFT), which regulate numbering resources in Mexico.
Dialing Formats and Caller Instructions
For local callers within the 429 area, the standard local dialing format requires only the seven-digit subscriber number. However, for calls originating from outside the area code but still within Mexico, the full national long-distance format must be used: 01 429 XXX XXXX. International callers must dial Mexico's country code (+52) followed by the area code and subscriber number, omitting the leading '0' used in domestic long-distance dialing. The complete international format is +52 429 XXX XXXX. For example, a local call to a number in Apaseo el Alto would simply be XXX XXXX, while a call from Mexico City would require 01 429 XXX XXXX, and a call from the United States would be +52 429 XXX XXXX.
Numbering Plan and Overlay Considerations
Mexico's numbering plan follows the ITU-T E.164 recommendation, with a country code of +52 and ten-digit national significant numbers (NSN) for geographic and mobile services. The 429 area code is not an overlay; it is a distinct geographic code that coexists with other codes in Guanajuato, such as 461 (Celaya), 464 (Salamanca), and 473 (Guanajuato City). This means that callers must always include the area code when dialing from outside the local area. As of the latest IFT updates, there are no immediate plans for an overlay in this region, but users should remain aware that dialing procedures may change if the IFT introduces overlays to meet future demand.
Services and Usage
Subscribers within the 429 area are served by major Mexican carriers, including Telmex, Telcel, AT&T Mexico, and regional providers. The code supports both fixed-line PSTN services and VoIP-based telephony, with number portability allowing users to retain their numbers when switching providers. For businesses, having a geographic number in this area can enhance local presence and customer trust. For callers, understanding the correct dialing format is essential to avoid misdialed calls and ensure connectivity. Whether you are a resident, a business owner, or an international caller, following the appropriate dialing procedures will ensure seamless communication with this region of Guanajuato.