inet6num: 2a0b,db00,,/29 netname: UK-ONETEL-20161028 country: GB org: ORG-OL6-RIPE admin-c: RT5719-RIPE tech-c: RT5719-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: ONETEL-MTNER created: 2016-10-28T10,20,30Z last-modified: 2016-10-28T10,20,30Z source: RIPE organisation: ORG-OL6-RIPE org-name: TalkTalk Communications Limited org-type: LIR address: Northbank House, 1 Siemens Road,Irlam, address: M44 5AH address: Manchester address: UNITED KINGDOM phone: +441612222000 fax-no: +441612222008 admin-c: MP15294-RIPE admin-c: RT5719-RIPE admin-c: PO2114-RIPE admin-c: RH2381-RIPE admin-c: GJB18-RIPE mnt-ref: ONETEL-MTNER mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: ONETEL-MTNER abuse-c: TTAT1-RIPE created: 2004-04-17T12,19,44Z last-modified: 2016-09-15T19,39,58Z source: RIPE e-mail: email@example.com person: Richard Tattersall address: TalkTalk Communications Limited address: Northbank Industrial Estate address: Irlam address: Manchester address: M44 5AH address: United Kingdom phone: +44 161 222-2000 fax-no: +44 161 222-2008 e-mail: firstname.lastname@example.org nic-hdl: RT5719-RIPE mnt-by: OPAL-MNT created: 2014-01-27T20,52,13Z last-modified: 2014-01-27T20,52,13Z source: RIPE route6: 2a0b,db00,,/29 descr: TalkTalk Broadband origin: AS12708 mnt-by: ONETEL-MTNER created: 2016-10-31T16,32,04Z last-modified: 2016-10-31T16,32,04Z 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.