CIDR block	2001:400::/23   !cidr !bgp
2001:400:: Type	Global Unicast
Number of IP addresses in the block	40564819207303340847894502572032 (4.056482e+31)
Netmask	ffff:fe00:0000:0000:0000:0000:0000:0000
Range [First - Last]	2001:400:: - 2001:05ff:ffff:ffff:ffff:ffff:ffff:ffff
Last Address long form	2001:05ff:ffff:ffff:ffff:ffff:ffff:ffff
Last Address short form	2001:5ff:ffff:ffff:ffff:ffff:ffff:ffff   !ip6 !rdap !whois !ptr !dnstr !tr !scan !g
Network/First Address long form	2001:0400:0000:0000:0000:0000:0000:0000
Network/First Address short form	2001:400::   !ip6 !rdap !whois !ptr !dnstr !tr !scan !g
!g 2001:0400::/23

  
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             |/
                        
        |\       /|
       /  \^____/  \
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     ||             ||
       \/         \/
        \|       |/
         \ _____ /
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      _  /\_____/\  _
      \\/IPDUHUDPI\//