inet6num: 2a01,5ae0,,/32 netname: UK-PULDS-20131127 country: GB org: ORG-PDSL3-RIPE admin-c: PH6294-RIPE tech-c: PH6294-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-lower: MNT-PULDS mnt-routes: MNT-PULDS notify: firstname.lastname@example.org created: 2013-11-27T10,32,37Z last-modified: 2016-04-14T10,18,02Z source: RIPE organisation: ORG-PDSL3-RIPE org-name: Pulsant Data Services Limited org-type: LIR address: 2 Anderson Place address: Edinburgh address: Edinburgh address: UNITED KINGDOM phone: +441315144006 fax-no: +448451199901 e-mail: email@example.com abuse-c: AC28229-RIPE mnt-ref: MNT-PULDS mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT created: 2013-11-22T13,44,17Z last-modified: 2016-10-06T15,36,28Z source: RIPE person: Pulsant Hostmaster address: Pulsant Data Services Limited address: Sugar Bond House address: 2 Anderson Place address: Edinburgh address: EH6 5NP phone: +44.8451199900 e-mail: firstname.lastname@example.org nic-hdl: PH6294-RIPE mnt-by: MNT-PULDS created: 2013-11-26T08,26,10Z last-modified: 2013-11-26T08,26,10Z source: RIPE route6: 2a01,5ae0,,/32 descr: Pulsant Data Services Limited origin: AS12703 mnt-by: MNT-PULSANT created: 2014-07-22T10,39,43Z last-modified: 2014-07-22T10,39,43Z 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.