Area Code 24 – St. Helena

Geographic Overview

The +290 country code is assigned to the British Overseas Territory of Saint Helena, Ascension, and Tristan da Cunha. Within this framework, the prefix 24 is designated as a geographic area code for the island of Saint Helena itself. This code is used for fixed-line telephone services on the island, which is one of the most remote inhabited islands in the world. The administrative center and main port, Jamestown, along with other settlements such as Half Tree Hollow and Longwood, fall under this numbering area.

Dialing Formats

When calling a fixed-line number on Saint Helena from abroad, the international format requires the country code, the area code, and the subscriber number. For example, a typical number might be +290 24XXX, where 'XXX' represents the local line number. The total length of a national significant number (NSN) for Saint Helena is four digits, meaning that after the country code and area code, there are only two to three digits for the subscriber number, depending on the specific allocation. For instance, a complete international dialing sequence would be +290 24 123 (hypothetical).

Locally, callers within Saint Helena can dial the subscriber number directly without the area code, as the island operates as a single closed numbering plan. However, for clarity and to avoid confusion, it is advisable to always use the full international format when communicating with overseas contacts.

Regulatory and Technical Notes

The numbering plan for Saint Helena is administered by the Communications Regulatory Authority of the territory. The '24' prefix is specifically allocated to fixed-line services, distinguishing it from other prefixes that may be used for mobile or other services. As of recent updates, Saint Helena has implemented number portability, allowing subscribers to retain their numbers when changing service providers, although the geographic significance of the prefix remains.

For callers from the United Kingdom or other countries, the international access code (usually '00' in Europe, or '011' from North America) must be dialed before the country code and area code. For example, from the UK, one would dial 00 290 24 123. From the US, it would be 011 290 24 123.

It is important to note that Saint Helena has a limited number of telephone lines, and the network infrastructure is relatively small. The island is also served by satellite and undersea cable connections, which may affect call quality and routing. Always check with your telecommunications provider for the most current dialing instructions and any applicable charges.