Area Code 918 – Chiapas
The phone area code for Chiapas is 918 (international format +52918). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 918
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Chiapas
Overview of Area Code 918
Area code 918 is a geographic National Destination Code (NDC) assigned to the state of Chiapas, Mexico, under the country calling code +52. It serves as the routing identifier for fixed-line (PSTN) and some VoIP-based local numbers within this region. The code covers a significant portion of Chiapas, including the capital city of Tuxtla Gutiérrez and surrounding municipalities. As a geographic code, it is tied to a specific territory, and numbers under this prefix are used for local wireline services, though some carriers may also route nomadic VoIP services over the same NDC.
Coverage and Administrative Jurisdiction
The 918 area code encompasses the central and western parts of Chiapas, with Tuxtla Gutiérrez as the primary urban center. Other localities served include Chiapa de Corzo, San Fernando, Berriozábal, and Suchiapa. Administratively, these municipalities fall under the state government of Chiapas, and the numbering plan is regulated by the Instituto Federal de Telecomunicaciones (IFT), Mexico's telecommunications authority. The geographic coverage is not contiguous with state borders; rather, it follows the numbering plan areas defined by IFT, which may include enclaves or exclusions based on population density and infrastructure.
Dialing Formats and Caller Instructions
For callers within Mexico, dialing a local number in the 918 area requires the format: 01 918 XXX XX XX (when calling from another area code) or simply 918 XXX XX XX for local calls within the same NDC. However, since 2019, Mexico has implemented the “Marcación a 10 dígitos” (10-digit dialing) nationwide, meaning that all domestic calls, including local ones, must be dialed as 10 digits without the 01 prefix. Therefore, a local call in Tuxtla Gutiérrez would be dialed as 918 XXX XX XX (10 digits). For international callers, the format is +52 918 XXX XX XX. For example, a number in Tuxtla Gutiérrez might be +52 918 123 45 67. It is crucial to omit the leading “0” when dialing from abroad.
Overlays and Numbering Considerations
Currently, there is no overlay code for 918; it remains the sole NDC for its service area. However, due to growing demand, IFT has implemented number pooling and reassignment strategies to ensure sufficient numbering resources. Mobile numbers in Chiapas are not part of this geographic prefix; they use the non-geographic mobile codes (e.g., 961, 967) or other NDCs assigned to mobile operators. Fixed-line numbers under 918 typically have a length of 8 digits after the NDC, making the total national significant number (NSN) 10 digits, as per ITU-T E.164 standards.
Practical Guidance for Callers
When calling from abroad, always replace the international access code with the plus sign (+) to ensure proper routing. For example, from the United States, dial 011 52 918 123 45 67 or +52 918 123 45 67. If you are within Mexico but outside the 918 area, dial 918 123 45 67 (10 digits). For local calls, simply dial the 8-digit subscriber number if your phone is configured for local dialing, but to avoid confusion, it is recommended to always use the full 10-digit format. This ensures compatibility with all networks, including VoIP and mobile.