Identifing ip address when running whois -h on a linux machine

when I run the following command, I suppose to get back ip addresses.

whois -h whois.radb.net -- '-i origin AS32934' | grep ^route

this is the result, in some cases it is understandable:

//ips end with 0-20
    route:      69.63.184.0/20
    route:      66.220.144.0/20
    route:      69.63.176.0/20

in other cases the output is different:

route6:     2620:0:1c00::/40
route6:     2a03:2880::/32
route6:     2a03:2880:fffe::/48
route6:     2a03:2880:ffff::/48
route6:     2620:0:1cff::/48

What does it means?

Thanks

Solution

What does it means?

Those are the notation for IPv6 Addresses.

route6: 2620:0:1c00::/40

route6: 2a03:2880::/32

route6: 2a03:2880:fffe::/48

route6: 2a03:2880:ffff::/48

route6: 2620:0:1cff::/48

More specifically, these are probably the subnets as they are ending in 0.