The current registrar of the .io zone is the Internet Computer Bureau and was assigned to it in 1997. The Internet Computer Bureau is a small company operating out of Bournemouth, UK. All .io registrations are ultimately done with the authority of the ICB.

Despite the fact that the .io extension was initially made for the BIOT, the only website actually registered in BIOT with this extension is sure.com, the only network provider in the area. A simple traceroute will show the list of IP addresses leading there. Most of the websites listed with the .io extension happen to be technology startups or blogs of one kind or another. From Bitcoin blogs to SaaS websites, to device manufacturers, .io has become the home for tech.