673 Country Code: Brunei (+673)
Country code 673 (+673) belongs to Brunei. Brunei uses the international dialing code +673, assigned by the International Telecommunication Union (ITU) under the E.164 standard. The ISO 3166-1 alpha-2 code is BN.
You will see the same code written several ways depending on origin: +673 (universal + prefix, works from mobile), 00673 (from countries that use 00 as their international exit code — most of Europe, Asia, and Latin America), 011 673 (from the US and Canada), 0011 673 (from Australia), or the bare 673. All refer to the same Brunei country code. Note: 673 is not a US area code — US area codes are also 3 digits but +673 is the international dialing code for Brunei, not a domestic US destination.
Below you will find the number format, trunk prefix, major city area codes, and dialing facts specific to Brunei (+673).
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Did You Get a Call from +673? Here's What That Means
Any incoming call that displays +673 followed by more digits is originating from Brunei. The caller is dialing you from a Brunei-registered phone number — either a landline or a mobile on a Brunei carrier.
Common reasons people receive calls from +673:
- -Family or friends in Brunei calling from a local number
- -Business contacts at Brunei-based companies
- -Customer support agents working from a Brunei call center
- -Travel-related calls (hotels, airlines, tour operators)
- -Less commonly, robocalls or scam calls that have spoofed a +673 number — if the call is unsolicited, do not return it without verifying the source
Brunei Phone Number Format
International Format Example
Domestic vs International
Drop 0 and prepend +673.
Calling Brunei Successfully: Common Mistakes & Best Practices
Most failed calls to Brunei come from one of four mistakes, not from network problems. The most common is mishandling the leading 0: domestically, Brunei numbers are written with 0 at the front (e.g. 07123456), but that 0 is the domestic trunk prefix and must be removed when calling from outside Brunei. Dial +673 followed directly by the local number without the 0.
The second is misreading the area code on landline numbers — Brunei numbers may have variable formatting depending on the carrier and city, so confirm the area code with the recipient before dialing. The third is dialing during off-hours — Brunei uses local business hours and consumer phones are usually answered between 8 AM and 9 PM local time. The fourth and most expensive mistake is assuming your US carrier's WiFi calling feature makes the call cheap. It does not — see WiFi calling vs VoIP for international calls for why.
For scam-call awareness: +673 is the legitimate Brunei country code, and most unsolicited calls from +673 numbers are legitimate calls from Brunei-based businesses, hospitals, family members, or call centers serving US customers. Caller-ID spoofing exists, so if a call from a +673 number claims to be from a US government agency, your bank, or the IRS, hang up and call the agency back on its published number. Real authorities never demand payment over the phone.
When you are ready to place a call, the cheapest reliable route is to dial +673 from your browser using Kinvo — no app, no carrier add-on, and the per-minute rate is shown before you connect so there are no bill surprises. The browser approach also works from any laptop, tablet, or phone you happen to have access to, which matters when you're traveling, using a work device, or borrowing someone else's computer.
Call Brunei from Your Browser
Call any Brunei number (+673) directly from Chrome, Firefox, Safari, or Edge. No install required. Use it in under 2 minutes.
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Frequently Asked Questions: Brunei Country Code
Which country is country code 673?
Country code 673 belongs to Brunei. The full international dialing code is +673, also written as 00673 from countries using 00 as their international exit code (Europe, most of Asia, Latin America), 011 673 from the US and Canada, or +673 from any mobile phone.
What is the country code for Brunei?
+673 is the international dialing code for Brunei, assigned by the ITU under E.164. The ISO 3166-1 alpha-2 code is BN. Equivalent forms — 00673, 011 673, +673, and 673 — all refer to the same Brunei country code.
Is 673 a US area code?
No. 673 is the international country code for Brunei, not a US area code. US area codes are also 3 digits but they are domestic North American Numbering Plan codes — to reach Brunei from the US, dial +673 or 011 673 followed by the local number.
Do I drop the 0 when calling Brunei from abroad?
Yes. Brunei uses 0 as its domestic trunk prefix. When dialing from another country, remove it and replace with +673. The trunk prefix is only needed for long-distance calls within Brunei.
Can I call Brunei from my browser?
Yes. Kinvo connects calls to Brunei via WebRTC directly from Chrome, Firefox, Safari, or Edge. No app download. Sign up, add credits from $5, and dial +673 followed by the local number.