Phone Numbers in Saint Helena, Ascension, and Tristan da Cunha
Quick Reference
- Country: Saint Helena, Ascension, and Tristan da Cunha
- Country Code: +290
- International Prefix: 00
- National Prefix: None
- Regulatory Authority: Saint Helena Government Communications Division
Overview
This guide provides a comprehensive overview of the telephone numbering system in Saint Helena, Ascension, and Tristan da Cunha. It details phone number structures, dialing procedures, and regulatory guidelines, making it a valuable resource for telecom professionals and businesses.
Number Formats
General Number Structure
Phone numbers in these territories have a consistent format, differing slightly between landline and mobile services:
Type | Format | Example |
---|---|---|
Landline | 2[0-57-9]XXXX | 2201234 |
Mobile | [5-6]XXXX | 51234 |
Special Services | 8XXXX | 81234 |
Regular Expressions for Number Validation
Use these regular expressions to validate phone numbers:
- Landline Numbers:
/^2[0-57-9]\d{4}$/
- Mobile Numbers:
/^[5-6]\d{4}$/
- Special Services:
/^8\d{4}$/
Dialing Procedures
Domestic Dialing
- Landline to Landline: Dial the 5-digit number directly.
- Landline to Mobile: Dial the 5-digit number directly.
- Mobile to Mobile: Dial the 5-digit number directly.
International Dialing
-
Outgoing International Calls:
Dial00
, followed by the country code, area code, and subscriber number.
Example: To call the UK, dial00 44 XXXXXXXXXX
. -
Incoming International Calls:
Dial+290
, followed by the 5-digit local number.
Example: From the UK to Saint Helena, dial+290 2201234
.
Recent and Upcoming Changes
Currently, there are no recent or planned changes to the numbering plan in these territories. The system remains stable as per the regulatory authority.
Number Portability
Saint Helena, Ascension, and Tristan da Cunha do not support number portability. Subscribers must change numbers when switching providers.
Major Telecom Operators
Operator | Service Type | Number Ranges |
---|---|---|
Sure South Atlantic | Landline | 2XXXX |
Sure South Atlantic | Mobile | 5XXXX, 6XXXX |
ITU-T Recommendations
The numbering plan complies with ITU-T Recommendation E.164, ensuring global consistency in phone number formats.
Number Allocation and Management
The Saint Helena Government Communications Division manages number allocations, ensuring adherence to ITU-T standards.
Technical Considerations for Developers
Developers should consider the following:
- Validation: Use provided regex for accurate validation.
- Formatting: Store and display numbers correctly, including the country code.
- Dialing Logic: Implement correct dialing procedures for calls.
- No Number Portability: Systems must account for static number allocations.
For the latest telecommunications regulations, visit the Saint Helena Government Communications Division.