Area Code 316 – Chittagong

Geographic Coverage and Administrative Jurisdiction

The +880 316 country-code/area-code combination identifies a specific geographic numbering area within the Chittagong Division of Bangladesh. More precisely, this National Destination Code (NDC) is allocated to the Chittagong City telephone exchange area, covering the central business district and its immediate surroundings. The administrative jurisdiction falls under the Bangladesh Telecommunication Regulatory Commission (BTRC), which manages the national numbering plan in accordance with ITU-T E.164 recommendations. Subscribers within this area are served by fixed-line PSTN infrastructure, and the code is used for both local and international dialing.

Primary Cities and Exchanges Served

The +880 316 prefix serves the heart of Chittagong, the country's second-largest city and primary seaport. Key areas covered include the central commercial zones, government offices, and residential neighborhoods within the city limits. It is important to note that Chittagong is a large metropolitan area with multiple exchange codes; +880 316 is just one of several NDCs used within the city. Other codes, such as +880 31, cover different parts of the city or surrounding regions. Therefore, callers must use the correct area code to reach their intended destination.

Dialing Formats and Instructions

For callers within Bangladesh, the local dialing format is 0 316-XXXXXX (where X represents the subscriber number). The leading '0' is the trunk prefix used to access the national network. For international callers, the format is +880 316-XXXXXX (or 011 880 316-XXXXXX from North America). The subscriber number length is typically six digits, making the total national significant number (NSN) ten digits (including the leading '0' for domestic calls). When dialing from a mobile phone within Bangladesh, the same format applies, but the '0' is essential.

Overlay and Numbering Considerations

As of the latest BTRC updates, there is no overlay code for the Chittagong area; the +880 316 code remains exclusive to its geographic region. However, subscribers may have the option to retain their numbers when switching between fixed-line operators, a process known as fixed number portability. This means that a number with the +880 316 prefix might be served by a different operator than the original one. For callers, this does not affect dialing procedures.

Practical Guidance for Callers

• Local callers: Dial 316-XXXXXX from any phone within Bangladesh (including mobile phones).
• International callers: Dial your country's exit code (e.g., 00, 011), then 880, then 316, followed by the six-digit subscriber number.
• Emergency and special numbers: These are not part of the geographic numbering plan; always use the national emergency numbers (e.g., 999 for police, fire, ambulance).

Always verify the subscriber number length, as it may vary in some cases. For further assistance, consult your telecom provider or the BTRC official numbering plan.