inet6num: 2a02,8010,,/29 netname: UK-ZEN-20110325 country: GB org: ORG-ZIL1-RIPE admin-c: RT1337-RIPE tech-c: ZIRA1-RIPE status: ALLOCATED-BY-RIR notify: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: ZEN-MNT created: 2012-07-25T10,06,04Z last-modified: 2016-07-04T14,32,31Z source: RIPE organisation: ORG-ZIL1-RIPE org-name: Zen Internet Ltd org-type: LIR address: Sandbrook Park, Sandbrook Way address: OL11 1RY address: Rochdale address: UNITED KINGDOM phone: +44 1706 902000 fax-no: +44 1706 902005 e-mail: email@example.com admin-c: BD2493-RIPE admin-c: RT1337-RIPE admin-c: ZIRA1-RIPE admin-c: JG2751-RIPE abuse-c: AR18024-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: ZEN-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: ZEN-MNT created: 2004-04-17T12,24,23Z last-modified: 2016-07-04T14,32,29Z source: RIPE role: Zen Internet RIPE Admin address: Zen Internet address: Sandbrook Park address: Sandbrook Way address: Rochdale address: OL11 1RY address: United Kingdom phone: +44 1706 902 000 fax-no: +44 1706 902 005 e-mail: firstname.lastname@example.org admin-c: RT1337-RIPE tech-c: JG2751-RIPE tech-c: BD2493-RIPE nic-hdl: ZIRA1-RIPE mnt-by: ZEN-MNT created: 1970-01-01T00,00,00Z last-modified: 2015-07-23T10,11,51Z source: RIPE person: Richard Tang address: Zen Internet address: Sandbrook Park address: Sandbrook Way address: Rochdale address: OL11 1RY address: United Kingdom phone: +44 1706 902 000 fax-no: +44 1706 902 005 nic-hdl: RT1337-RIPE created: 1970-01-01T00,00,00Z last-modified: 2014-01-17T11,06,19Z source: RIPE mnt-by: ZEN-MNT route6: 2a02,8010,,/29 descr: Zen Internet Limited origin: AS13037 mnt-by: ZEN-MNT created: 2012-08-02T15,52,24Z last-modified: 2012-08-02T15,52,24Z 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.