List of all registered .IO domains

Below you can find a list of all known .io domains for download.

We have collected data on 1,075,112 domains from British Indian Ocean Territory under the .IO top-level domain (ccTLD), of which 44,443 have been identified as actively registered. Additionally, 1 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	March 13, 2025	44,443	461
All known .IO domains	March 13, 2025	1,075,112	461
Detailed .IO domain list	March 13, 2025	44,443	461

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.