2a03:a000::/32 - UK-VDATA-20101202
inet6num: 2a03,a000,,/32 netname: UK-VDATA-20101202 country: GB org: ORG-VL5-RIPE admin-c: DM5875-RIPE tech-c: DM5875-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: VDATA-MNT mnt-routes: VDATA-MNT notify: email@example.com created: 2010-12-02T15,02,38Z last-modified: 2016-12-14T12,39,42Z source: RIPE organisation: ORG-VL5-RIPE org-name: VData Ltd org-type: LIR address: Nidderdale House , Beckwith Knowle , Otley Road address: HG3 1SA address: Harrogate address: UNITED KINGDOM phone: +44 1423850000 fax-no: +44 1423 858855 abuse-c: AR17981-RIPE admin-c: JT5167-RIPE admin-c: DM5875-RIPE admin-c: SC1355-RIPE admin-c: RAfI1-RIPE admin-c: SW1875-RIPE mnt-ref: VDATA-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: VDATA-MNT created: 2004-04-17T12,23,23Z last-modified: 2016-12-14T12,40,01Z source: RIPE e-mail: firstname.lastname@example.org person: Darren Marshall address: Redcentric Plc address: Central House address: Beckwith Knowle address: Harrogate, HG3 1UG address: GB mnt-by: VDATA-MNT phone: +44 (0)845 1207070 e-mail: email@example.com nic-hdl: DM5875-RIPE remarks: remarks: Abuse reports to firstname.lastname@example.org remarks: No action is taken on abuse reports sent to RIPE admins. remarks: created: 2005-04-01T14,37,45Z last-modified: 2016-03-11T10,44,31Z source: RIPE route6: 2a03,a000,,/32 descr: Intechnology PLC origin: AS13009 mnt-by: VDATA-MNT created: 2012-01-03T14,23,31Z last-modified: 2012-01-03T14,23,31Z 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.