.io is the country‑code top‑level domain (ccTLD) assigned to the British Indian Ocean Territory, a UK overseas territory in the Indian Ocean (ISO country code IO). Although the territory has no permanent residents, the .io extension has become one of the most recognizable web addresses in the tech community.
Developers and startups favor .io because “IO” conveniently evokes “input/output”, making it a natural fit for software, APIs, cloud services, gaming platforms and open‑source projects. High‑profile examples include codepen.io, opensea.io, and github.io. The extension is unrestricted – anyone can register a .io domain, and it is widely regarded as modern and tech‑savvy.
| Extension | Register | Renew | Transfer |
|---|---|---|---|
| .io | R 1 570.00 | R 1 570.00 | R 1 570.00 |
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