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Christmas Island Phone Numbers: Format, Area Code & Validation Guide
Quick Reference
Country: Christmas Island
Country Code: +61
International Prefix: 001[14-689]|14(?:1[14]|34|4[17]|[56]6|7[47]|88)0011
National Prefix: 0
Overview
This guide provides an in-depth look at the telephone numbering plan, dialing procedures, and telecommunications regulations in Christmas Island. It is essential for telecom professionals, developers, and systems administrators who need a thorough understanding of the technical aspects of phone numbers in this region.
Number Formats
General Number Structure
Phone numbers in Christmas Island adhere to the Australian numbering plan, utilizing the country code +61. The typical structure includes:
Country Code: +61
Area Code: 1 or 2 digits (if applicable)
Subscriber Number: 8 or 9 digits
Detailed Number Formats
Type
Format
Example
Description
Landline Numbers
8[1-9]XXXXXXX
891234567
Landline numbers start with '8' followed by 8 digits.
Mobile Numbers
4[0-9]XXXXXXX
412345678
Mobile numbers start with '4' and are followed by 8 digits.
Toll-Free Numbers
1800XXXXXX
1800123456
Toll-free numbers start with '1800' followed by 6 digits.
Premium Rate Numbers
190[0-9]XXXXXX
1900123456
Premium rate numbers start with '190X' followed by 6 digits.
Shared Cost Numbers
1300XXXXXX
1300123456
Shared cost numbers start with '1300' followed by 6 digits.
Regular Expressions for Number Validation
Landline Numbers:
^8[1-9]\d{7}$
Mobile Numbers:
^4\d{8}$
Toll-Free Numbers:
^1800\d{6}$
Premium Rate Numbers:
^190\d{6}$
Shared Cost Numbers:
^1300\d{6}$
Dialing Procedures
Domestic Calls
Landline to Landline: Dial the 8-digit subscriber number.
Example: 891234567
Landline to Mobile: Dial the 9-digit mobile number.
Example: 412345678
Mobile to Mobile: Dial the 9-digit mobile number.
Example: 412345678
International Calls
Outgoing International Calls: Dial 0011 + Country Code + Area Code (if applicable) + Subscriber Number.
Example: To call the US: 0011 1 212 555 1234
Incoming International Calls: Dial +61 followed by the local number without the leading 0.
Example: US caller dialing a Christmas Island number: +61 891234567
Recent Changes to the Numbering Plan
As of the latest updates, there have been no significant changes to the numbering plan in Christmas Island. The system remains aligned with Australia's telecommunications framework.
Number Portability
Currently, Christmas Island does not have a specific mobile number portability system. However, Australian telecommunications regulations, which may include number portability, could apply.
Major Telecom Operators and Number Ranges
Christmas Island’s telecommunications services are provided by major Australian operators:
Telstra: Dominates landline and mobile services.
Optus: Offers mobile services.
Vodafone: Provides mobile services.
ITU Recommendations
Christmas Island complies with the ITU-T Recommendation E.164, defining the international public telecommunication numbering plan.
Number Allocation and Management
The Australian Communications and Media Authority (ACMA) oversees the allocation and management of phone numbers in Christmas Island, ensuring efficient use of numbering resources in line with international standards.
Technical Restrictions and Special Cases
Golden Numbers: Special premium numbers with memorable sequences may be available, subject to availability and pricing by telecom operators.
Number Blocking: Certain number ranges may be blocked for security or regulatory reasons, though no specific cases have been reported for Christmas Island.
Technical Considerations for Developers
When developing systems for Christmas Island phone numbers, consider the following:
Validation: Use the provided regular expressions for phone number validation.
Internationalization: Ensure systems can handle the +61 country code and removal of the leading 0 for international calls.
Portability: While number portability may not be widely implemented, systems should be designed to accommodate potential future changes.