inet6num: 2a01,8100,fff1,,/48 netname: DADA_FLR_OFFICE country: IT admin-c: REGA-ripe tech-c: REGT-RIPE status: ALLOCATED-BY-LIR mnt-by: MNT-REGISTER created: 2016-06-07T13,53,57Z last-modified: 2016-06-07T13,53,57Z source: RIPE role: Register.it board - Direzione address: Register.IT S.p.A. address: Via Ponti, 6 address: 24126 Bergamo address: ITALY abuse-mailbox: firstname.lastname@example.org e-mail: email@example.com admin-c: CORB3-RIPE admin-c: CV4237-RIPE admin-c: GOR15-RIPE tech-c: REGT-RIPE nic-hdl: REGA-ripe mnt-by: MNT-REGISTER created: 2006-04-03T16,31,22Z last-modified: 2016-03-23T10,47,36Z source: RIPE role: register.it sistemisti address: Register.IT S.p.A. - Gruppo Sistemi address: Viale della Giovine Italia, 17 address: 50122 Firenze address: ITALY abuse-mailbox: firstname.lastname@example.org e-mail: email@example.com admin-c: REGA-RIPE tech-c: PERN1-RIPE tech-c: BAND1-RIPE tech-c: PERI55-RIPE tech-c: MILO2-RIPE tech-c: TV2675-RIPE nic-hdl: REGT-RIPE mnt-by: MNT-REGISTER created: 2006-04-03T16,40,50Z last-modified: 2016-10-17T09,42,34Z source: RIPE route6: 2a01,8100,fff1,,/48 origin: AS12363 mnt-by: MNT-REGISTER created: 2016-06-07T13,56,21Z last-modified: 2016-06-07T13,56,21Z 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.