tld reference
.io
British Indian Ocean Territory ccTLD adopted by tech.
.io was meant for the British Indian Ocean Territory but the 'I/O' coincidence pulled it into the dev tooling world around 2010. Today most VC-funded developer brands use it (GitHub.io, Sentry.io, Vercel.io once existed) and renewal prices reflect that demand — three to five times .com territory.
Concerns about the territory's contested governance occasionally resurface, but Identity Digital's operational stability and ICANN backing have kept .io safe in practice. The premium price is the real friction point, not legal risk.
Best for
developer tools, APIs, infrastructure brands, indie SaaS.
Renewal price across registrars $40–$60 per year. First-year promotional pricing may differ.
Best registrars for .io
Three registrars we’d use ourselves for a .io registration today, ranked by renewal cost transparency, support quality, and namespace availability.
- Search →PorkbunCheap renewals, no upsells, free WHOIS privacy + URL forwarding
- Search →Namecheap20% on domains, 35% on hosting plans, large catalogue
- Search →SpaceshipModern Namecheap sibling, ~25–50% affiliate commission
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Look up any .io domain
See live age, health score, registrar, DNS, SSL, and tech stack for any specific .io domain.