Home phone number Tristan da Cunha
Tristan da Cunha Phone Number validator
How the phone number format works
- Format
- Tristan da Cunha phone number in national or international (+290) format
- Example
- +2908999
Things to watch for
- Accepts national or international (E.164, e.g. +290...) format
- Validated with Google's libphonenumber; confirms the number is possible/valid for this country, not that it is currently assigned or reachable
^[+]?[0-9 ()\-]{6,}$A Tristan da Cunha phone number is a short 4-digit number under the country code +290, shared administratively with Saint Helena. Widely described as the most remote inhabited archipelago on Earth, Tristan da Cunha has a population of around 250 people, no airstrip of any kind, and is reachable only by an ocean voyage of several days from South Africa — its single settlement is officially named Edinburgh of the Seven Seas.
How this validator works
Enter the number in national form (8999) or full international form (+2908999); this tool checks the 4-digit length and pattern against Tristan da Cunha’s real numbering plan using Google’s libphonenumber, entirely client-side. Although Tristan shares its +290 code with Saint Helena, its national numbers are one digit shorter — 4 digits rather than Saint Helena’s 5 — so don’t assume the two follow identical formats just because they share a country code.
What a pass doesn’t tell you
A pass confirms the digits form a real Tristan da Cunha number shape — it doesn’t confirm the line is connected or in service, a separate question this free tool doesn’t try to answer.
Scope: useful for catching a malformed or wrong-length entry before a Tristan da Cunha number reaches a form — not a substitute for a real lookup service.
Content last reviewed 2026-08-09.
phone number FAQ
Is Tristan da Cunha really the most remote inhabited place on Earth?
It's widely cited as such — the nearest inhabited land, Saint Helena, is about 2,400 km away, and mainland South Africa is roughly 2,800 km away. With a population of around 250 people on one small volcanic island, Tristan has no airstrip and is reachable only by a multi-day boat voyage.
Why is Tristan da Cunha's number shorter than Saint Helena's?
Both share the +290 country code administratively, but Tristan's tiny, satellite-linked local exchange uses just 4 digits nationally, one shorter than Saint Helena's 5-digit numbers — a reflection of Tristan's population being smaller by a factor of roughly 20.
Does a valid check confirm a Tristan da Cunha number is currently active?
No. It only confirms the 4 digits match a real numbering pattern under +290 — not that the line is connected, which needs a carrier-side lookup this free tool doesn't perform.