Using RDAP instead of Whois
Registration Data Access Protocol (RDAP)
The Registration Data Access Protocol, or RDAP, has replaced the traditional port 43 Whois. ICANN no longer requires gTLD registries to provide a port 43 whois service.
How to Use RDAP instead of Whois
The Settings
module allows you to configure supported TLDs to use RDAP
instead of Whois. You can set the domain lookup sequence to 'Whois Only' or 'RDAP First' for each TLD. Please
see the screen shots blow.