Use !rdap-ip6 to lookup Registration Data for an IPv6 Address.

Registration data for Internet Protocol (IP) numbers are maintained by the Regional Internet Registries and contain registrant contact points along with technical details for each IP number registration.

Usually, you do not need to prefix an IPv6 address with !rdap-ip6 or !rdap-ip and just !rdap should work fine.

Usage Examples:
!rdap 2001:4860:4802:34::A
!rdap 2600:9000:20eb:2600:7:49a5:5fd6:da1
!rdap 2A02:26F0:117::42
!rdap-ip6 200::BC
!rdap-ip6 399::BC
!rdap-ip6 1337::
!rdap-ip6 FF05::101
!rdap-ip6 FF0E::101
!rdap-ip6 ff3d::8910:11
!rdap-ip6 ff34::4000:0
!rdap-ip 2001:67C:28CC:1::11
!rdap-ip 400::800
!rdap-ip FE80:B::DAE
!rdap-ip 0::1234
!rdap 2610::
!rdap 2620::
!rdap 2630::
!rdap 2003::3002


See also:
!help !whois
!help !rdap

  
                        
        |\       /|
       |  \_ __^/  | 
     ||  ___   ___  || 
    |||  \__| |__/  |||
     ||             ||
       |/         \|
         \ _____ /
         | \___/ |
      _  /\_____/\  _
      \\/IPDUHUDPI\//