We have collected data on 1,675,642 domains from British Indian Ocean Territory under the .IO top-level domain (ccTLD), of which 960,406 have been identified as actively registered. Additionally, 9 domains have been deleted and are currently in the quarantine (RGP) state, pending release for re-registration.

Type	Updated	Number of Domains	New Domains Today
All registered .IO domains	December 23, 2025	960,406	93
All known .IO domains	December 23, 2025	1,675,642	93
Detailed .IO domain list	December 23, 2025	960,406	93

The standard list of registered .IO domains comprises one domain per line.

The complete list of all known .IO domains is available in CSV format with two fields: the first is the domain name, and the second is its status (free, registered, or deleted).

Detailed domain lists include the following CSV fields, when available:

• Domain Name
• Webserver
• Request Time
• Number of HTML Elements
• Google IDs
• DNS Servers
• IP Addresses
• Crawl Date

We also provide custom crawling services should you require additional data beyond the standard information provided.