inet6num: 2a00,85a0,,/32 netname: UK-OAKFORDIS-20130514 country: GB org: ORG-OISL2-RIPE admin-c: RPS40-RIPE tech-c: RPS40-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: OIS-MNT mnt-routes: OIS-MNT notify: firstname.lastname@example.org created: 2013-05-14T08,50,41Z last-modified: 2016-09-22T10,53,23Z source: RIPE organisation: ORG-OISL2-RIPE org-name: Oakford Internet Services Ltd org-type: LIR address: 10, Prince Maurice Court address: Devizes address: SN10 2RT address: UNITED KINGDOM phone: +443302230230 fax-no: +441380727642 e-mail: email@example.com mnt-ref: OIS-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: OIS-MNT abuse-c: AC23748-RIPE created: 2013-04-29T13,42,36Z last-modified: 2016-09-22T10,53,29Z source: RIPE person: Peregrine Sharples address: Unit 10, Prince Maurice Court address: Devizes address: Wiltshire address: SN10 2RT address: United Kingdom phone: +44 3302 230 230 e-mail: firstname.lastname@example.org nic-hdl: RPS40-RIPE mnt-by: OIS-MNT created: 2013-04-30T12,11,32Z last-modified: 2013-04-30T12,11,32Z 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.