We call Registry to the company or organization who manages one or various domain extensions.

This organizations allows that other companies are accredited as Registrars in his system, allowing the management of domain name registration under this extension.

For an example, the Registry for .COM, .NET, .TV and .CC domains is Verisign, in the case of .BIZ, .US, .TEL and .TRAVEL is Neustar.

You can see the Registries where we are credited accessing at: Accreditation.