Area Code 994 – Oaxaca
The phone area code for Oaxaca is 994 (international format +52994). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 994
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Oaxaca
Geographic Coverage and Administrative Jurisdiction
The area code 994 is a geographic National Destination Code (NDC) assigned to the state of Oaxaca in southern Mexico. This code serves the central valleys and the capital city of Oaxaca de Juárez, along with surrounding municipalities such as Santa Cruz Xoxocotlán, San Antonio de la Cal, and Tlalixtac de Cabrera. The numbering area falls under the jurisdiction of the Federal Telecommunications Institute (IFT) and is allocated for fixed-line PSTN services, although some carriers may also route VoIP traffic over the same geographic numbers.
Dialing Formats and Numbering Structure
Mexican geographic numbers consist of a two-digit area code followed by an eight-digit local number. For the 994 region, the complete national significant number (NSN) is 10 digits (excluding the country code). When dialing locally within the same area code, callers can often omit the area code, but for clarity and to avoid misdialing, it is recommended to include the full 10-digit sequence.
- National long-distance dialing (from other Mexican states): Dial 01 + 994 + XXXX XXXX. Example: 01 994 123 4567.
- International dialing (from outside Mexico): Dial your country's exit code (e.g., 011 from the US/Canada) + 52 (Mexico's country code) + 994 + XXXX XXXX. Example: +52 994 123 4567.
Overlay and Numbering Plan Considerations
Currently, there is no overlay code for the 994 area. The region is served exclusively by this code, and no changes are anticipated in the near future. However, as part of Mexico's ongoing numbering plan optimization, all local calls within the country must be dialed using the 10-digit format (area code + local number) even for on-net calls, a practice that has been in effect since August 2019. This simplifies routing and ensures compatibility across all networks.
Caller Instructions
For local callers (within the 994 area): You may dial the 8-digit local number directly, but it is safer to dial the full 10-digit number (994 + local number) to avoid any potential routing issues, especially when calling from mobile phones.
For national callers (from other Mexican area codes): Always dial the long-distance prefix 01 followed by the area code and local number. This applies to both fixed and mobile calls.
For international callers: Use the plus sign (+) when dialing from a mobile phone, followed by the country code 52, the area code 994, and the local number. For example: +52 994 123 4567. This format is universally recognized and works from any country.
When calling from a foreign country, be aware that some carriers may require a specific exit code instead of the plus sign. Always check with your service provider for the correct international dialing prefix.