Area Code 31 – Negombo, Gampaha

Overview of Sri Lanka Area Code 31

Area code 31 is a geographic National Destination Code (NDC) assigned to the Negombo and Gampaha region of Sri Lanka. This code is part of the country's fixed-line telephone network, which is regulated by the Telecommunications Regulatory Commission of Sri Lanka (TRCSL). The region falls within the Western Province, a major economic and administrative hub adjacent to the commercial capital, Colombo. The area code 31 covers the Gampaha District, including the bustling coastal city of Negombo, known for its fishing industry and international airport proximity, as well as other towns such as Ja-Ela, Katana, and Seeduwa.

Dialing Formats

When calling a fixed-line number in the Negombo/Gampaha area, the standard international format is +94 31 XXXX XXX, where +94 is Sri Lanka's country calling code, 31 is the area code, and the subscriber number is typically seven digits long. For example, a local number might be written as +94 31 222 3456. Within Sri Lanka, callers from other regions must dial the trunk prefix 0 before the area code, resulting in 031 XXXX XXX. Local callers within the same area code can often dial just the seven-digit subscriber number, depending on the specific telecom operator's dialing plan.

Geographic Coverage and Administrative Jurisdiction

The Gampaha District, served by area code 31, is one of the most densely populated districts in Sri Lanka. It encompasses both urban and semi-urban areas, with Negombo serving as a key commercial center. The district is governed by multiple local authorities, including the Negombo Municipal Council and the Gampaha Municipal Council. The area's strategic importance is heightened by the presence of Bandaranaike International Airport (Katunayake), which lies within the district, making the region a focal point for business and tourism. Consequently, many hotels, travel agencies, and export-oriented enterprises rely on fixed-line numbers with the 31 prefix.

Overlay and Numbering Considerations

As of the latest TRCSL numbering plan, there is no overlay code for the 31 area; the code remains exclusive to the Gampaha District. However, due to increasing demand for telecommunication services, the TRCSL has implemented number conservation measures, including mandatory number portability for fixed-line services in some cases. Callers should always verify the complete number, as subscriber numbers may vary in length (typically 7 digits) depending on the operator and the specific exchange.

Caller Instructions

For international callers, always replace the leading zero (if present) with the country code +94. For example, to call a number in Negombo from abroad, dial +94 31 123 4567. For domestic callers outside the 31 area, dial 0 31 123 4567. When dialing from a mobile phone within Sri Lanka, the same trunk prefix 0 is required. It is advisable to confirm the exact number with the recipient, as misdialing the area code can route the call to a different district.