inet6num: 2a02,c540,,/29 netname: IT-CICORELLA-20150727 country: IT org: ORG-CS369-RIPE admin-c: GC19268-RIPE tech-c: VC4956-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-lower: extnet-mnt mnt-routes: extnet-mnt mnt-routes: fastweb-mnt created: 2015-07-27T12,29,17Z last-modified: 2016-04-14T10,02,47Z source: RIPE organisation: ORG-CS369-RIPE org-name: Cicorella srl org-type: LIR address: via Gravina, 28 address: 70022 address: Altamura address: ITALY e-mail: firstname.lastname@example.org admin-c: VC4956-RIPE tech-c: VC4956-RIPE abuse-c: AR32876-RIPE mnt-ref: it-cicorella-1-mnt mnt-by: RIPE-NCC-HM-MNT mnt-ref: RIPE-NCC-HM-MNT created: 2015-07-13T15,31,04Z last-modified: 2016-06-14T07,49,25Z source: RIPE phone: +39.0803118800 person: Giuseppe Cicorella address: Via Gravina, 28 phone: +39.0803118800 nic-hdl: GC19268-RIPE mnt-by: it-cicorella-1-mnt created: 2015-07-25T08,23,26Z last-modified: 2015-07-25T08,23,26Z source: RIPE person: Vincenzo Cicorella address: via Gravina, 28 address: 70022 address: Altamura address: ITALY phone: +39.0803118800 nic-hdl: VC4956-RIPE mnt-by: it-cicorella-1-mnt created: 2015-07-13T15,31,03Z last-modified: 2015-07-13T15,31,04Z source: RIPE route6: 2a02,c540,,/29 descr: CICORELLA-NETv6 origin: AS12874 mnt-by: FASTWEB-MNT created: 2015-11-18T15,44,36Z last-modified: 2015-11-18T15,44,36Z 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.