Area Code 27 – Brunei Muara

Overview of Brunei Area Code 27

Area code 27 is a geographic National Destination Code (NDC) assigned to the Brunei Muara District, the smallest but most populous district in Brunei. This district hosts the national capital, Bandar Seri Begawan, along with key commercial and administrative hubs. The code is used for fixed-line (PSTN) services within this region, connecting residences, businesses, and government offices.

Geographic Coverage and Administrative Jurisdiction

The Brunei Muara District is one of four districts in Brunei (alongside Belait, Tutong, and Temburong). It serves as the country's political and economic center. Major areas covered by the 27 code include:

• Bandar Seri Begawan (the capital city)
• Kianggeh and Berakas
• Gadong and Batu Bersurat
• Jerudong and Sengkurong
• Mukim areas such as Kilanas and Lumapas

Administratively, the district is divided into mukims (subdivisions), each with its own local exchanges. The 27 code is not an overlay; it is the sole geographic code for the district, and all fixed-line numbers within it share this prefix.

Dialing Formats and Caller Instructions

Brunei's national numbering plan follows ITU-T E.164, with a full national number length of 7 digits for fixed lines. The format is: 0 + NDC + Subscriber Number when dialed domestically.

Local Calls (within Brunei): To call a number in Brunei Muara from another part of Brunei, dial 0 followed by 27 and the 5-digit subscriber number. For example, to reach a fixed line in Bandar Seri Begawan with subscriber number 12345, dial 02712345.

International Calls (from outside Brunei): Callers from abroad must dial the international access prefix (e.g., 00 from most countries, or + from mobile phones), followed by Brunei's country code 673, then the area code 27 and the subscriber number. The leading '0' is omitted. The same example becomes +673 27 12345.

Important Note: When dialing from a mobile phone within Brunei, the leading '0' is often required, but when using the +673 international format, the '0' is always dropped.

Overlay and Numbering Considerations

Currently, there is no overlay code for Brunei Muara; the 27 code is exclusively used for fixed-line services. However, with the growth of VoIP and IP-based services, some numbers may be routed over non-geographic networks, but the dialing format remains the same. For international callers, it is crucial to replace the trunk prefix '0' with the country code +673 when dialing from abroad.

For any assistance, consult your local telecom provider or refer to the official numbering plan published by the Authority for Info-communications Technology Industry of Brunei Darussalam (AITI).