Understanding Phone Numbers in Nauru

Quick Reference Guide

• Country: Nauru
• Country Code: +674
• International Prefix: 00
• National Prefix: None
• Regulatory Authority: Nauru Utilities Corporation (NUC)

Technical Overview

Nauru uses a closed numbering plan, eliminating the need for a national prefix when dialing within the country. All phone numbers, whether landline or mobile, are 7 digits long. The international dialing code is +674, with no area or city codes.

Number Structure

• Country Code: +674
• Subscriber Number Length: 7 digits
• Prefixes:
  • Landline: Starts with 444
  • Mobile: Starts with 555, 666, 88X
  • Special Services: Information not available

Number Formats by Type

Dialing Procedures

• Domestic Calls:

  • Landline to Landline: Dial the 7-digit number directly (e.g., 4441234).
  • Landline to Mobile: Dial the 7-digit number directly (e.g., 5551234).
  • Mobile to Mobile: Dial the 7-digit number directly (e.g., 6665678).

• International Calls:

  • Outgoing: Dial 00 + <Country Code> + <Subscriber Number>.
  • Incoming: Dial +674 followed by the 7-digit local number (e.g., +6744441234).

Number Portability

Currently, Nauru does not offer mobile number portability (MNP), meaning subscribers cannot retain their phone numbers when switching between service providers.

Telecom Operators and Number Ranges

Recent and Upcoming Changes

As of the latest update, there are no changes to the numbering plan. Any modifications would be regulated by the Nauru Utilities Corporation (NUC).

Technical Considerations for Developers

When developing systems handling Nauru's phone numbers, consider:

• Validation: Use regular expressions to validate phone numbers by type (landline or mobile).
• Formatting: Ensure consistent formatting, especially for international dialing (+674).
• Portability: Systems do not need to accommodate number transfers between operators due to the lack of number portability.
• Number Allocation: Managed by the Nauru Utilities Corporation (NUC), and changes are infrequent.

Example Regex for Validation

// Landline validation
/^444\d{4}$/

// Mobile validation
/^(555|666|88\d)\d{4}$/

Number Allocation and Management

The Nauru Utilities Corporation (NUC) manages the allocation and management of telephone numbers in Nauru, ensuring compliance with ITU-T E.164 standards.

Technical Restrictions and Special Cases

There are no known "golden numbers" or specific restrictions like number blocking within Nauru's current numbering plan. All numbers follow the standard format, with special cases managed by the NUC.