2a01:6ca0::/32 - UK-PULMK-20131218
inet6num: 2a01,6ca0,,/32 netname: UK-PULMK-20131218 country: GB org: ORG-PDML1-RIPE admin-c: PH6335-RIPE tech-c: PH6335-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-lower: MNT-PULMK mnt-routes: MNT-PULMK notify: email@example.com created: 2013-12-18T09,00,18Z last-modified: 2016-04-14T08,56,01Z source: RIPE organisation: ORG-PDML1-RIPE org-name: Pulsant Data MK Limited org-type: LIR address: 2 Anderson Place address: Edinburgh address: Edinburgh address: UNITED KINGDOM phone: +441315144006 fax-no: +448451199901 e-mail: firstname.lastname@example.org abuse-c: AC28290-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: MNT-PULMK mnt-by: RIPE-NCC-HM-MNT created: 2013-11-29T10,55,38Z last-modified: 2016-02-22T14,26,26Z source: RIPE person: Pulsant Hostmaster address: Sugar Bond House, address: 2 Anderson Place phone: +448451199999 e-mail: email@example.com nic-hdl: PH6335-RIPE mnt-by: MNT-PULMK created: 2013-12-16T14,33,11Z last-modified: 2013-12-16T14,33,12Z source: RIPE route6: 2a01,6ca0,,/32 descr: Pulsant Data MK Limited origin: AS12703 mnt-by: MNT-PULSANT created: 2014-07-22T10,37,01Z last-modified: 2014-07-22T10,37,01Z 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.