Brunei Country Code +673
The international country calling code for Brunei Darussalam is +673. Brunei uses a closed 7-digit numbering plan with no trunk prefix. Local numbers are dialed the same way inside and outside the capital Bandar Seri Begawan, and from abroad you simply add +673 in front of the seven-digit national number.
Fixed lines usually start with 2–5, while mobiles commonly begin with 7 or 8, for example +673 2 123456 (landline) or +673 8 765432 (mobile). There is no leading 0 to drop or add, which makes Bruneian numbers comparatively easy to store and validate in CRMs, booking systems and messaging platforms.
This guide explains how Brunei phone numbers are structured, how to call Brunei (+673) from overseas, how Brunei Darussalam Time (BNT, UTC+8) affects meeting planning, and which emergency numbers (991 / 993 / 995 / 998) you should know when contacting partners, suppliers or travelers in this small but high-income sultanate on the island of Borneo.
Example landline (intl.)
+673 2 123456
Country code +673 plus a 7-digit fixed number, commonly starting with 2–5.
Example mobile
+673 8 765432
Mobiles often use 7XX XXXX or 8XX XXXX ranges, total 7 digits after +673.
Time & daylight saving
BNT (UTC+8) · No DST
Same clock time as Singapore, Kuala Lumpur and parts of China; Brunei does not observe summertime.
Overview – where +673 is used
The country code +673 is used exclusively in Brunei Darussalam, a small energy-rich sultanate on the northern coast of Borneo. You will see +673 numbers on oil & gas operators in Seria, government offices in Bandar Seri Begawan, Islamic finance institutions and a growing number of ICT and logistics providers serving the wider ASEAN region.
Brunei’s national regulator, the Authority for Info-communications Technology Industry (AITI), maintains a closed 7-digit numbering plan. The old area codes and trunk “0” were removed in the early 2000s, so callers inside Brunei dial the same 7 digits that international callers use after the +673. This simplifies both user experience and system-side validation for international businesses.
Thanks to the country’s compact size and high mobile penetration, many companies rely primarily on mobile numbers starting with 7 or 8 as their main contact channel, often tied to WhatsApp and other OTT apps. For serious B2B work, it is important to store those contacts in correct E.164 format to avoid issues with SMS or cloud-telephony routing.
Typical +673 use cases in practice
- Energy & petrochemicals – onshore and offshore operations, refineries and industrial estates in Brunei-Muara and Belait districts.
- Government & public services – ministries, agencies and educational institutions concentrated around Bandar Seri Begawan.
- Tourism & eco-travel – hotels, tour operators and transport services connecting visitors to Brunei’s rainforest national parks.
For all of these, the dialing logic is the same: +673 + 7 digits from abroad, or just the 7 digits when you are already in Brunei.
Brunei phone number formats (+673)
Generic pattern: +673 N XXXXXX (7 digits)Bruneian telephone numbers follow a simple closed format: country code +673 followed by a 7-digit national significant number (NSN). There is currently no national trunk prefix, and callers inside Brunei dial all seven digits directly without a leading 0.
- • Landlines (fixed): typically written as 2XXXXXX, 3XXXXXX, 4XXXXXX or 5XXXXXX. Internationally: +673 2XXXXXX, etc.
- • Mobile numbers: often use 7XX XXXX or 8XX XXXX, again for a total of 7 digits after +673.
- • Short codes & special services: 3-digit codes such as 991, 993, 995, 998 are reserved for emergency services and other public functions.
When cleaning data, remove spaces and punctuation but do not add or strip any leading zero – Bruneian numbers do not use a national 0 prefix. A valid full international number will always be +673 followed by exactly 7 digits.
Sample Brunei numbers
Illustrative onlyExample of a 7-digit landline starting with 2. Local users dial 2123456.
Mobile example using a 7XX XXXX range. Local calls: 7654321.
Another fixed line pattern. For E.164 storage, always include the +673.
How to dial Brunei (+673)
1. From the USA or Canada
To call Brunei from North America, use the international prefix 011, then 673, then the 7-digit number.
- Dial 011 – US/Canada exit code.
- Dial 673 – Brunei country code.
- Dial the 7-digit fixed or mobile number.
Example (New York → Bandar Seri Begawan landline 2123456): 011 673 2 123456.
2. From the UK, EU or most other countries
In much of Europe, Asia and Africa, the international prefix is 00, followed by 673 and the 7-digit local number.
- Dial 00 – international access code.
- Dial 673 – country code for Brunei.
- Dial the Bruneian number (7 digits).
Example (London → mobile 8765432): 00 673 8 765432.
3. Dialing within Brunei
- Local call (anywhere in the country): dial the 7-digit number directly (e.g. 2345678 or 7654321).
- International from Brunei: 00 + foreign country code + number.
- No national trunk “0”: Brunei’s trunk prefix was withdrawn; do not prepend 0 for domestic calls.
Example (Brunei → Singapore number +65 6123 4567): 00 65 6123 4567.
Normalisation tip: any valid Brunei number should be stored as +673 followed by exactly 7 digits. If you see 8+ digits (excluding +673), it is likely a formatting error or a non-Bruneian number.
Time in Brunei – Brunei Darussalam Time (BNT, UTC+8)
Brunei uses a single nationwide time zone: Brunei Darussalam Time (BNT), which is fixed at UTC+8 throughout the year. There is no daylight saving time, so clocks in Bandar Seri Begawan remain constant while many other countries shift in spring and autumn.
BNT shares the same UTC offset as Singapore, Malaysia, parts of China and Western Australia’s standard time. For teams in Europe or North America, this means Brunei is typically a late-afternoon or evening call destination, depending on your own time zone.
When planning meetings, always confirm whether your calendar tool is using the explicit Asia/Brunei time zone identifier. This ensures the correct offset is applied even if other regions change in or out of daylight saving time.
Brunei vs other major time zones
| City / region | Time zone | Offset vs BNT |
|---|---|---|
| Bandar Seri Begawan | BNT (UTC+8) | Reference |
| Singapore / Kuala Lumpur | UTC+8 | Same local time |
| London (winter) | UTC or GMT | Brunei is +8 hours |
| Central Europe (winter) | UTC+1 | Brunei is +7 hours |
| US Eastern (standard) | UTC−5 | Brunei is +13 hours |
As a rough rule, 08:30–11:00 BNT works reasonably for evening calls to Europe, while 16:00–19:00 BNT overlaps with early-morning business hours on the US East Coast.
Emergency numbers in Brunei
Brunei uses 3-digit abbreviated numbers for emergency services. Visitors and remote teams should be familiar with at least four codes: 991 (ambulance), 993 (police), 995 (fire & rescue) and 998 (search & rescue).
Ambulance / medical
991
Call 991 for medical emergencies, accidents and urgent transport to hospital. This is the primary emergency health number.
Police
993
Use 993 for crimes in progress, threats to personal safety and situations requiring immediate police intervention.
Fire & rescue
995
Call 995 for building and vehicle fires, road traffic extrications and other incidents requiring the fire & rescue department.
Search & rescue
998
998 connects to search & rescue, particularly relevant for coastal, offshore or remote-area incidents.
Some mobile devices may allow 112 or 911 to be dialed as an emergency code, but the official Brunei numbers remain 991 / 993 / 995 / 998, and you should prefer these whenever possible.
Examples: calling +673 numbers
US (Los Angeles) → Bandar Seri Begawan office (fixed)
Office number shown as: 2123456.
- Add the country code 673 → 673 2 123456.
- From the US, prepend exit code 011.
Result: 011 673 2 123456
Germany (Berlin) → Brunei mobile
Mobile listed as: +673 8 765432.
- From Germany, dial 00.
- Dial 673.
- Dial the 7-digit mobile: 8 765432.
Result: 00 673 8 765432
Inside Brunei – local mobile call
A colleague’s mobile is 7654321.
- From anywhere in Brunei, just dial 7654321.
- No 0, no area code, no extra prefix needed.
International callers use: +673 7 654321.
Brunei country code +673 – FAQ
How many digits are in a Brunei phone number?
Standard Brunei numbers have 7 digits after the country code. There is no extra area code or trunk prefix; both fixed and mobile lines are stored and dialed as +673 XXXXXXX.
Does Brunei use area codes?
Historically there were separate area codes, but the system was simplified into a closed 7-digit plan. Today, callers dial the same 7-digit number nationwide, and the first digit hints at the service type (for example fixed vs mobile) rather than a geographic area code in the traditional sense.
What is the international dialing prefix from Brunei?
To call abroad from Brunei, you dial 00 followed by the foreign country code and number. For example, a call to a UK landline +44 20 7123 4567 from Brunei would be dialed as 00 44 20 7123 4567.
Does Brunei observe daylight saving time?
No. Brunei Darussalam Time (BNT) is fixed at UTC+8 all year round. Any changes to the time difference between Brunei and your country will be due to your region switching in or out of daylight saving time.
Which emergency number should I use as a visitor?
For most emergencies in Brunei, you will use: 991 for ambulance, 993 for police, 995 for fire & rescue and 998 for search & rescue. Save these in your phone before traveling.
Are WhatsApp and mobile numbers the same in Brunei?
In most cases, yes. Businesses and residents generally use their regular +673 7XX XXXX / 8XX XXXX mobile numbers as their WhatsApp contact. For reliable delivery, always store the number in full +673XXXXXXX format rather than a local 7-digit version.
Download the Brunei (+673) dialing & time zone cheat sheet
Get a one-page PDF covering Brunei’s +673 country code, 7-digit number formats, fixed & mobile prefixes, BNT time zone and emergency numbers. Ideal for support desks, sales teams and travel coordinators working with Bruneian contacts.