Area Code 3 – Beliat

Overview of Brunei Area Code 3

Area code 3 is the National Destination Code (NDC) assigned to the Belait District in Brunei Darussalam. This geographic code covers the westernmost part of the country, including the administrative town of Kuala Belait and the oil town of Seria. The district is a key hub for the energy sector, hosting major facilities of Brunei Shell Petroleum. The code is used for fixed-line (PSTN) services, and numbers under this prefix follow the national numbering plan defined by the Authority for Info-communications Technology Industry of Brunei Darussalam (AITI).

Geographic Coverage and Cities

The area code 3 serves all landline subscribers within the Belait District. Primary localities include:

• Kuala Belait – the district capital and administrative center.
• Seria – known for its oil and gas industry and the Billionth Barrel Monument.
• Kuala Balai and other smaller settlements along the Belait River.

Note that mobile numbers in Brunei are not prefixed with 3; they use their own dedicated mobile codes (e.g., 7 and 8). Therefore, dialing 3 is exclusively for fixed-line subscribers in the Belait region.

Dialing Formats

Brunei’s national numbering plan uses a closed dialing system. The full national significant number (NSN) for a Belait fixed line is 7 digits long, beginning with the digit 3. When calling from within Brunei, you must dial the full 7-digit number, including the leading 3. For example, a local number in Kuala Belait might be 333 1234 (a 7-digit number).

To call a Belait fixed line from overseas, you dial the international prefix (e.g., 00 or +), followed by Brunei’s country code 673, and then the 7-digit number. For instance, to call the number 333 1234 from abroad, you would dial +673 333 1234. Do not add any extra trunk prefix (such as 0) after the country code, as Brunei does not use a trunk prefix for international dialing.

Caller Instructions

Local callers (within Brunei): Simply dial the 7-digit number, e.g., 333 1234. If you are calling from a mobile phone, you can also dial the number directly without any additional codes.

International callers: Dial your country’s exit code, then 673, then the 7-digit number. For example, from the US/Canada, dial 011 673 333 1234; from the UK, dial 00 673 333 1234; from most mobile phones, you can use +673 333 1234.

Overlays and Numbering Considerations

As of the latest AITI updates, there are no overlay codes for the Belait district. The 3 code is exclusively used for geographic fixed-line services in that area. Number portability is available for fixed lines in Brunei, allowing subscribers to retain their numbers when changing service providers, but the geographic significance of the code remains.

For businesses or individuals requiring a presence in the Belait District, obtaining a number with the 3 prefix is essential for establishing a local fixed-line identity. This code is not used for VoIP or non-geographic services, which have their own dedicated ranges.