Area Code 0155 – Port-Gentil

Overview of Gabon's +241 0155 Geographic Prefix

The +241 0155 prefix is a geographic National Destination Code (NDC) assigned to the city of Port-Gentil, the economic capital of Gabon and the country's second-largest city. Port-Gentil is located on the Ogooué River delta and serves as the primary hub for Gabon's oil and gas industry. This prefix is used for fixed-line (PSTN) services within the city, and it is administered under Gabon's national numbering plan, which follows ITU-T E.164 recommendations.

Geographic Coverage and Administrative Jurisdiction

The 0155 code covers the urban and suburban areas of Port-Gentil, including the central business district, residential neighborhoods, and industrial zones. It is part of the Ogooué-Maritime Province, and the prefix is allocated to local fixed-line operators providing services within this region. As a geographic code, it is tied to the physical location of the subscriber's line, meaning that calls to this prefix terminate at a fixed address within Port-Gentil.

Dialing Formats and Caller Instructions

To call a number with the +241 0155 prefix, the full national significant number (NSN) is 9 digits long, starting with the trunk prefix '0' followed by the NDC '155' and the subscriber number. The international format is +241 155 XXXXX, where '155' is the NDC without the leading '0'. For example, a local number might be written as 0155 12 34 56. When dialing from within Gabon, you must include the trunk prefix '0' (e.g., 0155 12 34 56). When dialing from abroad, you replace the '0' with the country code +241, so the number becomes +241 155 12 34 56.

Overlay and Numbering Plan Considerations

Currently, there is no overlay code for Port-Gentil; the 0155 prefix is unique to the city. However, Gabon has been modernizing its telecommunications infrastructure, and number portability may allow subscribers to retain their numbers when changing operators. In such cases, the geographic significance of the prefix may become less strict, but for most fixed-line services, the prefix still indicates the service area.

Practical Usage and Cost Implications

For callers within Gabon, calls to 0155 numbers are typically charged as local or national fixed-line rates, depending on the caller's location and operator. International callers will incur international tariffs, which vary by provider. Businesses in Port-Gentil often use these numbers for customer service and administrative lines. When contacting a Port-Gentil business from abroad, always use the full international format to ensure proper routing.