inet6num: 2a01,5400,,/32 netname: UK-JPCINET-20101228 country: GB org: ORG-JIL1-RIPE admin-c: MM27253-RIPE tech-c: MM27253-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: JPCINET-MNT mnt-routes: JPCINET-MNT notify: firstname.lastname@example.org created: 2010-12-28T12,54,59Z last-modified: 2017-02-16T17,27,38Z source: RIPE organisation: ORG-JIL1-RIPE org-name: JPC Infonet Ltd org-type: LIR address: Bradford Road, Bryer Ash Business Park, Suite 2, First Floor address: BA14 8AW address: Trowbridge address: UNITED KINGDOM phone: +441225776555 fax-no: +441225774299 e-mail: email@example.com admin-c: MM27253-RIPE mnt-ref: JPCINET-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: JPCINET-MNT abuse-c: AMC212-RIPE created: 2004-04-17T12,17,04Z last-modified: 2017-02-16T17,27,48Z source: RIPE person: Matthew Moore address: Unit 2 address: Bryer Ash Business Park address: Trowbridge address: Wiltshire address: BA14 8HE address: UK phone: +44 (0)1225 776555 ext. 213 fax-no: +44 (0)1225 774299 e-mail: firstname.lastname@example.org nic-hdl: MM27253-RIPE notify: email@example.com mnt-by: JPCINET-MNT created: 2002-05-16T13,18,45Z last-modified: 2015-12-07T13,56,31Z source: RIPE route6: 2a01,5400,,/32 descr: JPCINET Route v6 origin: AS12775 mnt-by: JPCINET-MNT created: 2010-12-28T13,33,36Z last-modified: 2010-12-28T13,33,36Z 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.