Area Code 351 – Rangamati

Overview of Area Code +880 351

Area code 351 is the National Destination Code (NDC) for the Rangamati Hill District in the Chittagong Hill Tracts region of southeastern Bangladesh. It is a geographic code assigned to the fixed-line (PSTN) network, administered under the Bangladesh Telecommunication Regulatory Commission (BTRC). The code serves the district headquarters of Rangamati and its surrounding administrative areas, including upazilas such as Kaptai, Kawkhali, and Baghaichhari. As a geographic number, it is tied to a specific physical location, and calls are routed based on the caller's destination.

Dialing Formats

For callers within Bangladesh, the national dialing format is 0 351-XXXXXX, where the leading 0 is the trunk prefix used to access the national network. The subscriber number typically consists of six digits, making the total national significant number (NSN) length 10 digits (including the leading 0). For international callers, the format is +880 351-XXXXXX, where +880 is the country code for Bangladesh, and the leading 0 is omitted. For example, a local number might be dialed as +880 351-123456 from abroad.

Geographic Coverage and Administration

Rangamati is one of the three hill districts in the Chittagong Hill Tracts, known for its scenic lakes and indigenous communities. The area code 351 is administered by the state-owned operator BTCL (Bangladesh Telecommunications Company Limited) and is also used by other licensed PSTN operators providing fixed-line services in the region. The district is divided into several administrative units, and the code covers the main urban area of Rangamati town as well as rural exchanges within the district.

Caller Instructions

When calling a fixed-line number in Rangamati from another city in Bangladesh (e.g., Dhaka), you must dial 0 351 followed by the subscriber number. From a mobile phone within Bangladesh, the same format applies. For international callers, the process is straightforward: dial your country's international access code (e.g., 011 from the US, 00 from most European countries), then 880, then 351, and finally the six-digit subscriber number. Note that mobile numbers in Bangladesh have their own prefixes (e.g., 017, 018) and are not affected by this geographic code.

Overlay and Numbering Considerations

Currently, there is no overlay code for Rangamati; the 351 code is exclusively used for the district. However, as the demand for fixed-line services evolves, BTRC may introduce additional digits or overlay codes, but no such plans have been announced. For VoIP and IP telephony users, the same dialing rules apply, but ensure that your service provider supports calls to Bangladeshi geographic numbers.