fetchwhois
Powered by the official IANA RDAP protocol

.io WHOIS Lookup

Look up any .io domain instantly. FetchWhois queries the authoritative RDAP server and returns the full registration record for any .io domain — registrar, key dates, nameservers, DNSSEC and contact details — free and live.

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Instant results

Real-time WHOIS domain lookups resolved directly from authoritative RDAP servers — no queues, no waiting.

ICANN-grade accuracy

Every ICANN lookup pulls structured data straight from the registry and registrar, following the official RDAP standard.

Hundreds of TLDs

From .com and .org to .io, .dev and country-code domains — powered by the IANA bootstrap registry.

Private & simple

No sign-up and no domain upsells. Just clean, trustworthy WHOIS results every time.

How the .io WHOIS lookup works

Live .io RDAP data straight from the authoritative registry.

1Step 1

Enter a .io domain name

Type the .io domain name into the search box. .io is extremely popular among tech startups, SaaS products and developer tools.

2Step 2

FetchWhois queries the .io RDAP server

Identity Digital manages the .io registry on behalf of the British Indian Ocean Territory administration. We resolve the RDAP endpoint via IANA and query it live.

3Step 3

Read the .io registration record

Registrar, creation and expiry dates, status codes, nameservers and DNSSEC data are displayed in a readable layout with raw RDAP JSON available.

.io domains: the tech startup TLD of choice

.io is the country-code TLD (ccTLD) for the British Indian Ocean Territory, but it has become overwhelmingly associated with technology startups, software products, developer tools, API services and online games — largely because 'IO' is the computing abbreviation for 'input/output'. Despite its ccTLD status, .io behaves like a gTLD in practice: there are no residency requirements, registrations are open worldwide, and pricing and RDAP data access follow gTLD norms. Identity Digital (formerly Afilias) manages the registry on behalf of the British Indian Ocean Territory.

WHOIS lookups for .io domains return a standard RDAP record with registrar, dates, status codes, nameservers and DNSSEC. Contact redaction is common since most registrars treat .io under GDPR-equivalent policies. The .io TLD has experienced strong growth alongside the startup ecosystem and is now one of the most recognisable non-legacy TLDs in the world. Premium .io names — especially short dictionary words — command significant market prices.

.io WHOIS Lookup — Frequently Asked Questions

Everything you need to know about WHOIS, ICANN and RDAP domain lookups.