2a00:df80:1::/48 - HU-GPINETKFT-VEP
inet6num: 2a00,df80,1,,/48 netname: HU-GPINETKFT-VEP descr: country: HU admin-c: TGP3-RIPE tech-c: TGP3-RIPE mnt-routes: AS12301-MNT mnt-by: MNT-GPINET status: ASSIGNED created: 2016-09-15T09,44,12Z last-modified: 2016-09-15T09,50,52Z source: RIPE person: Tamas Gergely Peter address: 9723 Gyongyosfalu address: Petofi Sandor utca 10. phone: +36 30 394 0488 nic-hdl: TGP3-RIPE mnt-by: MNT-GPINET created: 2007-03-16T10,44,51Z last-modified: 2007-03-16T20,42,54Z source: RIPE route6: 2a00,df80,1,,/48 origin: AS12301 mnt-by: AS12301-MNT created: 2016-09-23T14,13,03Z last-modified: 2016-09-23T14,13,03Z source: RIPE
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.