021 area code — Brunei Muara
In Brunei, the area code 021 covers Brunei Muara. Numbers are written internationally as +673 21.
How to call Brunei Muara
- From abroad
- +673 21 XXX XXXX
- Within Brunei
- 021 XXX XXXX
- Country calling code
- +673
About the 021 area code
When you see a number beginning +673 21, it belongs to Brunei Muara: the 673 is Brunei's country calling code and 21 is the area code.
Area codes like 021 tie a phone number to a place — useful for knowing where a call or message originates, and for signing up to services that expect a local Brunei number. To actually receive an SMS on a Brunei number, a temporary or virtual line does the job without exposing your own SIM.
Frequently asked questions
What area code is Brunei Muara?
Brunei Muara uses the area code 021, written internationally as +673 21.
How do I call Brunei Muara from another country?
Dial your international access code, then +673 21, then the local number — dropping the national leading 0.
What time is it in Brunei Muara?
Brunei Muara is in the Asia/Brunei time zone; the live clock above shows the current local time.
Is 021 a mobile or a landline code?
021 is a geographic (landline) area code for Brunei Muara. Mobile numbers in Brunei use their own separate prefixes.