We have collected data on 1,658,043 domains from British Indian Ocean Territory under the .IO top-level domain (ccTLD), of which 936,282 have been identified as actively registered.

Type	Updated	Number of Domains	New Domains Today
All registered .IO domains	September 25, 2025	936,282	147
All known .IO domains	September 25, 2025	1,658,043	147
Detailed .IO domain list	September 25, 2025	936,282	147

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.