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Sent TeamMar 8, 2026 / phone number standards / Article

Cook Islands Phone Numbers: Format, Area Code & Validation Guide

Understand Cook Islands phone number formats (+682) with this technical guide. Learn the 5-7 digit subscriber number structure, landline (2XXXX) & mobile patterns ([578]XXXX). Includes regex for validation: `/^[2-578]\d{4}$/`. No area codes used; adheres to ITU-T E.164.

Cook Islands Phone Numbers: Format, Area Code & Validation Guide

Quick Facts

  • Country: Cook Islands
  • Country Code: +682
  • International Prefix: 00
  • National Prefix: None

Comprehensive Guide to Cook Islands Phone Numbers

This guide offers a thorough overview of the Cook Islands' telephone numbering system, detailing number formats, dialing procedures, and essential technical considerations for telecommunications professionals and developers working with Cook Islands phone numbers.

Number Structure

General Number Structure

Phone numbers in the Cook Islands follow this structure:

  • Country Code: +682
  • Subscriber Number Length: 5 to 7 digits
  • No Area Codes: The Cook Islands do not use area codes.

Number Formats by Type

TypeFormatExampleNotes
General Numbers[2-578]X{4}22578Applies to most numbers, including landline and mobile.
Landline Numbers2X{4}22345Typically starts with '2'.
Mobile Numbers[578]X{4}57890Commonly starts with '5', '7', or '8'.

Regular Expressions for Validation

To validate Cook Islands phone numbers, use these regular expressions:

  • General Numbers: /^[2-578]\d{4}$/
  • Landline Numbers: /^2\d{4}$/
  • Mobile Numbers: /^[578]\d{4}$/

Dialing Procedures

Domestic Calls

  • Landline to Landline: Dial the 5 to 7-digit local number directly.
  • Landline to Mobile: Dial the 5 to 7-digit mobile number directly.
  • Mobile to Mobile: Dial the 5 to 7-digit mobile number directly.

International Calls

  • Outgoing: Dial 00 (International Prefix) + Country Code + Subscriber Number.
    • Example: To call New Zealand from the Cook Islands, dial 00 64 XXXXXX.
  • Incoming: Dial +682 followed by the 5 to 7-digit local number.

Number Portability

Currently, no information is available on number portability in the Cook Islands. For updates, consult local telecom operators.

Telecom Operators and Number Ranges

The primary telecom provider in the Cook Islands is Telecom Cook Islands (TCI). Specific number ranges are not publicly disclosed.

ITU Standards Compliance

The Cook Islands adhere to the [ITU-T E.164 standard](https://www.itu.int/en/ITU-T/inr/Pages/default.aspx) for international numbering plans, ensuring global telecommunications compatibility.

Number Allocation and Management

The Telecommunications Regulatory Authority (TRA) oversees number allocation and management, ensuring compliance with national and international standards.

Technical Restrictions and Special Cases

  • Golden Numbers: No publicly available information on golden number allocation.
  • Number Blocking: Details on number blocking practices are not disclosed.

Technical Considerations for Developers

Key Points for Systems Integration

  1. Validation: Use the provided regular expressions to validate phone numbers.
  2. Storage: Store numbers in the E.164 format (e.g., +682XXXXXX) for international compatibility.
  3. Dialing Logic: Implement logic that handles both domestic and international dialing scenarios correctly.
  4. No National Prefix: The absence of a national prefix simplifies local dialing rules.

Info: For the latest telecommunications regulations in the Cook Islands, visit the Telecommunications Regulatory Authority (TRA) official website.

This guide aims to provide a clear understanding of the Cook Islands' phone number system, ensuring efficient communication and integration for businesses and developers.

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