Phone Numbers in French Guiana: A Technical Guide

Quick Reference

• Country: French Guiana
• Country Code: +594
• International Prefix: 00
• National Prefix: 0

Overview

Gain a comprehensive understanding of the telephone numbering plan in French Guiana. This guide covers phone number structures, dialing procedures, number portability, and regulatory standards, tailored for telecom professionals and developers.

Number Formats

General Number Structure

French Guiana phone numbers are structured as follows:

• Country Code: +594
• National Prefix: 0 (for domestic calls)
• Subscriber Number: 9 digits (excluding the country code)

Number Types and Formats

Numbering Scheme

• Geographic Numbers: Start with 0594 for landlines.
• Mobile Numbers: Start with 0694 for mobile devices.
• Toll-Free Numbers: Start with 0800, free for the caller.
• Premium Rate Numbers: Start with 089X, used for services with extra charges.
• Emergency Numbers: Use 112 for emergencies.

Dialing Procedures

Domestic Dialing

• Landline to Landline: Dial the full number, including 0. Example: 0594 XX XX XX.
• Landline to Mobile: Dial the full mobile number, including 0. Example: 0694 XX XX XX.
• Mobile to Mobile: Dial the full mobile number, including 0. Example: 0694 XX XX XX.

International Dialing

• Outgoing International Calls: Dial 00 + [Country Code] + [Subscriber Number]. Example: 00 1 212 555 1234 for the US.
• Incoming International Calls: Dial +594 followed by the 9-digit subscriber number. Example: +594 694 12 34 56.

Number Portability

Mobile number portability is available, allowing subscribers to switch providers while retaining their numbers, regulated by ARCEP.

Regulatory Information

• Regulatory Body: Managed by ARCEP, the French telecom authority.
• ITU-T Recommendations: Adheres to ITU-T E.164 standards.

Telecom Operators and Number Ranges

Number Allocation and Management

Numbers are allocated by ARCEP, ensuring compliance with ITU standards. Special cases like golden numbers may have unique rules.

Technical Considerations

Regular Expressions for Validation

Use these regex patterns to validate French Guiana phone numbers:

# Geographic Numbers
^0594\d{6}$

# Mobile Numbers
^0694\d{6}$

# Toll-Free Numbers
^0800\d{6}$

# Premium Rate Numbers
^089\d{7}$

# Emergency Numbers
^112$

System Integration

• Normalization: Store numbers in international format (e.g., +594 694 12 34 56).
• Validation: Use regex patterns for validation.
• Portability Checks: Implement checks for number portability.