inet6num: 2a00,17d8,,/32 netname: DE-ROUTING-20160823 country: DE admin-c: HRN6-RIPE tech-c: HRN6-RIPE mnt-by: ROUTING-MNT status: AGGREGATED-BY-LIR created: 2016-08-23T15,35,48Z last-modified: 2016-08-23T15,36,23Z source: RIPE assignment-size: 48 role: Hostmaster http.net address: Franzstr. 51 address: 52064 Aachen address: Germany phone: +49 030 2100900 fax-no: +49 030 21009090 e-mail: email@example.com admin-c: OG2671-RIPE tech-c: OG2671-RIPE nic-hdl: HRN6-RIPE notify: firstname.lastname@example.org mnt-by: ROUTING-MNT created: 2002-07-19T14,23,53Z last-modified: 2016-08-23T14,18,29Z source: RIPE abuse-mailbox: email@example.com route6: 2a00,17d8,,/32 descr: routing.net origin: AS12574 mnt-by: ROUTING-MNT created: 2013-09-18T17,06,14Z last-modified: 2013-09-18T17,06,14Z 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.