Area Code 835 – Tamaulipas
The phone area code for Tamaulipas is 835 (international format +52835). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 835
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Tamaulipas
Geographic Coverage and Administrative Context
The Mexican area code 835 is a geographic National Destination Code (NDC) assigned to the northeastern state of Tamaulipas. Specifically, it serves the southern and central sub-regions of the state, including municipalities such as Ciudad Mante, Ocampo, Antiguo Morelos, and Nuevo Morelos. These areas are part of the Huasteca Tamaulipeca region, characterized by agricultural production and proximity to the Sierra Madre Oriental. The code is administered under the Federal Telecommunications Institute (IFT) numbering plan and is allocated for fixed-line (PSTN) services, though some carriers may offer VoIP-based fixed telephony using this code.
Dialing Formats and Caller Instructions
For domestic callers within Mexico, the dialing format is: 01 835 XXX XXXX. The leading 01 is the national long-distance prefix, followed by the area code and the seven-digit local number. For international callers, the format is: +52 835 XXX XXXX, where +52 is Mexico's country calling code. It is important to note that when dialing from abroad, the national long-distance prefix (01) must be omitted. Local calls within the same area code do not require the 01 prefix; users can dial the seven-digit number directly. However, due to the North American Numbering Plan influence, some neighboring regions may require the full national format even for local calls; always verify with your service provider.
Overlays and Numbering Considerations
As of the latest IFT updates, area code 835 does not have an overlay. The region historically shared numbering resources with adjacent codes, but current allocations are distinct. The seven-digit subscriber number provides a theoretical capacity of up to 10 million lines, though actual utilization is far lower given the rural and semi-urban nature of the area. No major overlay is planned in the near term, but users should be aware that number portability allows subscribers to retain their 835 numbers when switching providers, even if they move outside the geographic region, which can occasionally lead to non-local numbers being associated with this code.
Practical Guidance for Callers
For businesses or individuals placing calls to 835 numbers, it is essential to confirm the correct dialing sequence. For example, a typical number might be +52 835 123 4567. When calling from a mobile phone in Mexico, the 01 prefix is often optional, as mobile networks automatically route long-distance calls. However, using the full international format (+52) is always safe. For those using VoIP services, ensure that your provider supports calls to Mexican geographic numbers and be aware that per-minute charges may apply. Operators in the region include Telmex, Totalplay, and various cable operators offering fixed telephony.