Domain .ac - national domain: Saint Helena

Domain .ac — Ascension Island, used worldwide for "academic"

.ac is the country code top-level domain (ccTLD) for Ascension Island, a small British Overseas Territory in the South Atlantic. The territory is part of "Saint Helena, Ascension and Tristan da Cunha" — three islands sharing one administration but each with its own ccTLD (Saint Helena uses .sh, Tristan da Cunha uses .ta).

What makes .ac genuinely interesting is what happens beyond Ascension itself: "AC" is the standard shorthand for "academic", and many countries use .ac.something as the suffix for universities (e.g. .ac.uk in the UK, .ac.jp in Japan). That coincidence has turned .ac into a globally popular extension for academic institutions, research projects, and clever domain hacks far beyond the South Atlantic.

The .ac registry is run by NIC.AC, a subsidiary of Internet Computer Bureau Limited (ICB), now part of Identity Digital (via the Afilias acquisition), on behalf of the local sponsor Sure (Ascension Island).

What is a .ac domain used for?

The actual local population of Ascension Island is about 800 people — mostly contract workers supporting the airfield, BBC World Service relay, and NASA / ESA ground stations. So most .ac registrations come from outside the island, for these purposes:

• academic institutions and projects — universities, research groups, journals, conferences, online courses, EdTech startups
• domain hacks — zodi.ac, mani.ac, alman.ac, insomni.ac, cogni.ac, celi.ac, fan.ac — any word ending in "ac" becomes a clever address
• Aachen, Germany — the city's vehicle licence-plate code is "AC", so some Aachen brands and projects use .ac as a local-feel extension
• brandable two-letter — short, memorable addresses for startups, tech products, and creative brands (similar appeal to .io, .co, .as)
• gaming and tech projects — notable adopters include the Easy Anti-Cheat anti-cheat platform
• brand protection — locking in a .ac form of a trademark, especially for brands with academic or research-adjacent positioning
• Ascension Island-connected businesses — the small local economy of telecom, broadcast relay, and military support services

Who can register a .ac domain?

Almost everyone. Registration at the second level (yourname.ac) is open to anyone in the world — no eligibility checks or residency requirements in practice. The registry's published rules suggest second-level applicants should hold professional or academic qualifications, but this isn't enforced. Third-level registrations (under specific sub-domains) are restricted to Ascension Island residents.

Registration is processed in real time — your domain is active right after you complete your order.