Ascension Island Phone Number Guide

Quick Facts

• Location: Ascension Island
• Country Code: +247
• International Dialing Prefix: 00
• National Prefix: None

Introduction

Discover the comprehensive guide to understanding phone number formats and dialing procedures in Ascension Island. Whether you're setting up telecom systems or need to know local formats, this guide provides all the essential details.

Number Formats

Ascension Island employs a structured numbering plan crucial for effective communication. Here's a breakdown:

General Structure

• Country Code: +247
• National Significant Number (NSN): 4 to 5 digits

Geographic Numbers

Used for landline services:

• Format: 6[2-467]X{3}
• Examples: 6223, 6467

Mobile Numbers

Distinct from landlines:

• Format: 4X{3}
• Examples: 494, 424

Special Service Numbers

Due to a small population, special service numbers are limited:

• Format: N/A
• Examples: N/A

Number Formats Table

Number Type	Format	Example
Geographic (Landline)	6[2-467]X{3}	6223, 6467
Mobile	4X{3}	494, 424

Validation with Regular Expressions

For developers, these regex patterns ensure valid phone numbers:

• Geographic Numbers:
  ^6[2-467]\d{3}$
  

• Mobile Numbers:
  ^4\d{3}$
  

Dialing Procedures

Domestic Calls

• Landline to Landline: Dial directly.
• Landline to Mobile: Dial directly.
• Mobile to Mobile: Dial directly.

International Calls

• Outgoing: Dial 00 + [Country Code] + [Area Code] + [Subscriber Number].
• Incoming: Dial +247 + [Local Number].

Number Portability

Currently, Ascension Island does not support number portability, meaning numbers cannot be retained when changing providers.

Telecom Operators

Ascension Island's primary telecom provider is:

• Sure South Atlantic Ltd: Manages all number ranges.

ITU-T Compliance

Ascension Island adheres to the ITU-T E.164 standard, ensuring global compatibility.

Number Management

Managed by the Ascension Island Government in coordination with Ofcom, numbers are allocated based on demand to prevent exhaustion.

Technical Notes

• Golden Numbers: No specific allocation details available.
• Number Blocking: Some ranges may be reserved internally.

Developer Considerations

• Validation: Use regex patterns for number validation.
• Formatting: Store numbers in E.164 format.
• Integration: Always prepend +247 for international systems.
• Error Handling: Account for lack of number portability.