The country code for Brunei Darussalam is +673. This code is required when dialing a Brunei number from another country. It precedes the subscriber's local number.

To dial a Brunei landline, use the format 2XXXXXX or 3XXXXXX, where X represents any digit. Landline numbers in Brunei are always seven digits long and begin with 2 or 3. No national prefix is required for domestic calls within Brunei.

Brunei mobile numbers are typically 7 or 8 digits long. These numbers usually start with 7 or 8, depending on the service provider. For example, DST Communications uses the '8' prefix, while Progresif uses '7'.

To call Brunei from the US or any other country, first dial the international exit code (00 or +), then Brunei's country code (+673), followed by the 7- or 8-digit local number. For example, 00 673 XXXXXXX.

Format Brunei numbers according to the E.164 standard for international use. This involves placing a '+' before the country code and the subscriber number, for example: +673XXXXXXXX.

The international prefix, or exit code, for Brunei is 00. This prefix is dialed before the country code when making international calls from Brunei.

In Brunei, DST Communications uses the prefix '8' for its mobile numbers, while Progresif uses the prefix '7'. Telekom Brunei (TelBru) handles landline numbers with prefixes '2' and '3'.

Brunei phone numbers include landline (7 digits starting with 2 or 3), mobile (7-8 digits starting with 7 or 8), emergency services (3 digits, often starting with 9), and premium rate numbers (4-5 digits starting with 1).

Brunei's closed numbering plan, with fixed-length phone numbers, simplifies call routing and number allocation. It ensures predictable dialing patterns for all types of phone numbers.

Mobile Number Portability (MNP) allows Brunei users to keep their existing mobile number when switching service providers. This fosters competition among providers and benefits consumers.

Use the provided regular expressions (regex) when developing applications that require Brunei phone number validation, such as online forms or databases. This ensures data accuracy and compliance with Brunei's number format standards.

The Authority for Info-communications Technology Industry (AITI) manages number allocation, enforces regulations, and ensures Brunei adheres to international telecommunications standards. Refer to their website (aiti.gov.bn) for details.

Golden numbers in Brunei are special phone numbers reserved for easier recall. They are often sought after by businesses for marketing and branding purposes due to their memorable sequences.