Area Code 251 – Valença
The phone area code for Valença is 251 (international format +351251). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 251
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Valença
Geographic Overview
The +351 251 area code is a geographic National Destination Code (NDC) assigned to the northern region of Portugal, specifically the district of Viana do Castelo and its surrounding areas. The primary city served under this code is Valença, a historic municipality located on the banks of the Minho River, which forms the border with Spain. The code also covers neighboring towns and parishes such as Monção, Paredes de Coura, and Vila Nova de Cerveira, all within the sub-region of Alto Minho.
Dialing Formats
When calling a landline in Valença from within Portugal, subscribers must dial the national trunk prefix 0, followed by the area code 251 and the subscriber's 7-digit number. For example, a local Valença number might be formatted as 251 123 4567 for domestic calls. Internationally, callers should dial the Portuguese country code +351, then the area code without the leading zero, followed by the subscriber number: +351 251 123 4567.
Caller Instructions
- Local callers within the Valença area may be able to dial just the 7-digit subscriber number for local calls, depending on the specific carrier and local dialing plan. However, it is always safe to use the full national format (0-251-XXX-XXXX) to avoid errors.
- Domestic callers from other regions of Portugal must always include the trunk prefix 0 and the area code 251.
- International callers should replace the trunk prefix 0 with the country code +351, omitting the 0 entirely.
Regulatory and Technical Notes
The 251 area code is part of the closed numbering plan of Portugal, which means that all national numbers have a fixed length of 9 digits (including the leading 0). The geographic area codes are assigned by ANACOM, the Portuguese regulatory authority, and are used for fixed-line PSTN and VoIP services. In recent years, number portability allows subscribers to retain their 251 numbers even if they switch operators, but the geographic significance remains tied to the original location.
For businesses and residents in Valença, the 251 code is an integral part of their local identity, often used in marketing and local directories. When calling from mobile phones, the same international format applies, and callers should be aware that charges may vary depending on their operator and plan.