Understanding Phone Numbers in Guinea

Quick Reference Guide

• Country: Guinea
• Country Code: +224
• International Prefix: 00
• National Prefix: None
• Typical Number Length: 9 digits (excluding country code)

Comprehensive Overview

Gain a thorough understanding of Guinea's telephone numbering plan with this detailed guide. It serves as an essential resource for telecom professionals, developers, and systems administrators who need to navigate the intricacies of Guinea's phone numbers, including their structure, dialing procedures, and regulatory framework.

Number Formats Explained

General Number Structure

Guinea's phone numbers are formatted as follows:

• Country Code: +224
• Subscriber Number: 9 digits

Landline Numbers

Landline numbers in Guinea adhere to a specific format:

• Format: 3XXXXXXX
• Length: 9 digits (including the initial '3')
• Example: 30243123

Mobile Numbers

Mobile numbers in Guinea are distinguished by certain prefixes:

• Format: 6XXXXXXX
• Length: 9 digits (including the initial '6')
• Example: 622345678

Special Service Numbers

Guinea has designated short codes for emergency services:

• Emergency Services:
  • Police: 17
  • Fire Department: 18
  • Medical Emergency: 15

Number Format Table

Type	Format	Length	Example
Landline	3XXXXXXX	9 digits	30243123
Mobile	6XXXXXXX	9 digits	622345678
Police Emergency	17	2 digits	17
Fire Department	18	2 digits	18
Medical Emergency	15	2 digits	15

Regular Expressions for Validation

Use these regular expressions to validate Guinea's phone numbers:

• Landline:
  ^3\d{7}$
  

• Mobile:
  ^6\d{7}$
  

• Emergency Services:
  ^(15|17|18)$
  

Dialing Procedures in Guinea

Domestic Calls

• Landline to Landline: Dial the 9-digit number directly.
• Landline to Mobile: Dial the 9-digit mobile number directly.
• Mobile to Mobile: Dial the 9-digit mobile number directly.

International Calls

• Outgoing: Dial 00, followed by the country code, and then the subscriber number. For instance, to call France, dial 00 33 XXXXXXXXX.
• Incoming: From abroad, dial the international access code, followed by Guinea's country code +224, and then the 9-digit local number.

Number Portability

Currently, Guinea does not offer number portability for mobile or fixed-line numbers. Subscribers must change their phone numbers when switching telecom operators.

Major Telecom Operators and Number Ranges

Operator	Mobile Number Range	Landline Number Range
Orange Guinea	620xxxxxx - 629xxxxxx	302xxxxxx - 309xxxxxx
MTN Guinea	620xxxxxx - 629xxxxxx	302xxxxxx - 309xxxxxx
Cellcom Guinea	620xxxxxx - 629xxxxxx	302xxxxxx - 309xxxxxx

ITU-T Recommendations

Guinea complies with the ITU-T Recommendation E.164, which standardizes international telephone number formats.

Number Allocation and Management

The Guinean Telecommunications Regulatory Agency (ARPT) oversees the allocation and management of phone numbers in Guinea, ensuring adherence to international standards and fair distribution among telecom operators.

Technical Restrictions and Special Cases

There are no special restrictions or cases such as golden numbers within Guinea's numbering plan. All numbers follow the standard formats and rules.

Technical Considerations for Developers

1. Validation: Implement the provided regular expressions for number validation.
2. Formatting: Ensure numbers adhere to the E.164 standard for international use.
3. Dialing Rules: Apply correct dialing rules for both domestic and international calls.
4. Number Management: Be aware of number ranges assigned to operators for accurate call routing.