Brunei Phone Numbers: Format, Area Code & Validation Guide

Quick Reference

• Country: Brunei Darussalam
• Country Code: +673
• International Prefix: 00
• National Prefix: None

Overview

Discover the comprehensive details of Brunei Darussalam's telephone numbering system. This guide is essential for telecom professionals, developers, and businesses interacting with Brunei Darussalam, covering number structures, dialing procedures, and more.

Number Formats

General Number Structure

Brunei Darussalam uses a closed numbering plan with fixed-length numbers:

• Country Code: +673
• Subscriber Number Length: 7 or 8 digits, depending on the service type

Landline Numbers

Landline numbers are 7 digits long, starting with '2' or '3':

• Format: [2-3]XXXXXX
• Example: 2234567

Regular Expression:

/^[23]\d{6}$/

Mobile Numbers

Mobile numbers range from 7 to 8 digits, typically starting with '7', '8', or '9':

• Format: [78]XXXXXXX
• Example: 81234567

Regular Expression:

/^[78]\d{6,7}$/

Special Service Numbers

These numbers are shorter, used for emergencies and customer support:

• Emergency Numbers: 3 digits (e.g., 991)
• Premium Rate Numbers: Start with '1', 4 to 5 digits long

Regular Expression:

/^1\d{3,4}$/

Comprehensive Number Format Table

Dialing Procedures

Domestic Calls

• Landline to Landline: Dial the 7-digit number directly.
• Landline to Mobile: Dial the 7- or 8-digit mobile number directly.
• Mobile to Mobile: Dial the 7- or 8-digit mobile number directly.

International Calls

• Outgoing International Calls: Dial 00 followed by the country code, area code, and local number. For example, to call the US, dial 00 1 XXXXXXXXXX.
• Incoming International Calls: Dial +673 followed by the 7- or 8-digit local number.

Number Portability

Brunei Darussalam supports Mobile Number Portability (MNP), allowing users to retain their numbers when switching providers. Fixed-line portability is not available.

Major Telecom Operators and Number Ranges

• DST Communications: Uses '8' prefix for mobile services.
• Progresif: Uses '7' prefix for mobile services.
• Telekom Brunei (TelBru): Provides fixed-line services with '2' and '3' prefixes.

ITU-T Recommendations

Brunei Darussalam follows the [ITU-T E.164 standard](https://www.itu.int/rec/T-REC-E.164/en) for international numbering, ensuring global uniqueness and dialability.

Number Allocation and Management

The Authority for Info-communications Technology Industry (AITI) manages number allocation and ensures compliance with international standards. Visit their official website for more information.

Technical Restrictions and Special Cases

• Golden Numbers: Reserved for easy recall, often used by businesses.
• Number Blocking: Some ranges may be blocked for security reasons.

Technical Considerations for Developers

Validation Functions

Use the following function to validate Brunei Darussalam phone numbers:

function validateBruneiNumber(number) {
    const landlinePattern = /^[23]\d{6}$/;
    const mobilePattern = /^[78]\d{6,7}$/;
    const specialPattern = /^1\d{3,4}$/;

    return landlinePattern.test(number) || mobilePattern.test(number) || specialPattern.test(number);
}

Number Formatting

Ensure numbers are formatted according to the E.164 standard for international use.

References

For the latest telecommunications regulations, visit the Authority for Info-communications Technology Industry (AITI) website.