.io

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.io
NIC.IO -- .IO Domain Registry
Introduced 1997
TLD type Country code top-level domain
Status Active
Registry NIC.IO (run by Internet Computer Bureau)
Sponsor IO Top Level Domain Registry (Cable and Wireless)
Intended use Entities connected with  British Indian Ocean Territory
Actual use Popular with startup companies; little of anything related to the territory itself.
Registration restrictions None for 2nd level registrations; 3rd level registrant must be resident of British Indian Ocean Territory
Structure Registrations are taken directly at the second level or at third level beneath various 2nd-level labels
Documents Terms & Conditions; Rules
Dispute policies Dispute Resolution Policy
Website NIC.IO
DNSSEC yes

.io is the Internet country code top-level domain (ccTLD) for the British Indian Ocean Territory. Internationalized domain names may also be registered.[1]

Google currently treats .io as a generic top-level domain (gTLD) because "users and webmasters frequently see [the domain] more generic than country-targeted".[2]

.io domains are popular with new startup companies.[3] IO is also used in IT as an abbreviation for input/output, which makes the .io domain useful for domain hacks.

There is a trend to create .io domains for open source projects and free/open web services.[citation needed]

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