Comprehensive Guide to Guinea-Bissau Phone Numbers
Quick Reference
- Country: Guinea-Bissau
- Country Code: +245
- International Prefix: 00
- National Prefix: None
- Number Length: 8 digits
Overview
Discover essential information about the telephone numbering plan in Guinea-Bissau. This guide covers phone number structures, dialing procedures, and regulatory standards, making it indispensable for telecom professionals and developers working in the region.
Number Structure
General Number Format
Guinea-Bissau utilizes an 8-digit numbering plan without area codes. Phone numbers are structured based on service type, such as landline or mobile:
- Country Code: +245
- Subscriber Number: 8 digits
Number Formats by Type
| Type | Format | Example | Description |
|---|---|---|---|
| Landline | 44X{6} | 44376543 | Landline numbers start with '44' followed by 6 digits. |
| Mobile | 9[567]X{6} | 95565695 | Mobile numbers start with '95', '96', or '97' followed by 6 digits. |
| Special Services | 80X{5} | 80012345 | Special service numbers start with '80' and are 8 digits in length. |
Regular Expressions for Number Validation
Ensure numbers conform to expected formats using these regex patterns:
- Landline:
^44\d{6}$ - Mobile:
^9[567]\d{6}$ - Special Services:
^80\d{5}$
Dialing Procedures
Domestic Calls
- Landline to Landline: Dial the 8-digit number directly.
- Landline to Mobile: Dial the 8-digit mobile number directly.
- Mobile to Mobile: Dial the 8-digit mobile number directly.
International Calls
- Outgoing: Dial
00, followed by the country code, and then the destination number. - Incoming: International callers should dial their international access code,
+245, and then the 8-digit local number.
Recent or Upcoming Changes
Currently, there are no recent changes to Guinea-Bissau's numbering plan. The system remains stable with no significant modifications announced.
Number Portability
Guinea-Bissau does not offer mobile number portability, meaning users cannot retain their numbers when switching providers.
Major Telecom Operators
Key telecom operators include:
- Guiné Telecom: The state-owned provider.
- Orange Guinea-Bissau: A leading mobile network operator.
For more details, visit the Autoridade Reguladora das Comunicações de Guiné-Bissau (ARCOM) official website.
ITU-T Standards
Guinea-Bissau adheres to ITU-T E.164 recommendations, ensuring consistent international numbering and facilitating global telecommunications interoperability.
Number Allocation and Management
The Autoridade Reguladora das Comunicações de Guiné-Bissau (ARCOM) manages phone number allocation, ensuring compliance with international standards.
Technical Restrictions and Special Cases
There are no specific technical restrictions like golden numbers in Guinea-Bissau's numbering plan. All numbers follow the standard 8-digit format.
Technical Considerations for Developers
When integrating Guinea-Bissau phone numbers into systems, consider:
- Validation: Use the provided regex patterns to ensure correct formatting.
- Internationalization: Systems should handle the
+245country code and manage prefixes for different dialing scenarios. - Portability: Since number portability is unavailable, do not assume numbers can be retained across operators.
For the latest telecommunications regulations, visit the ARCOM official website.