2a03:34e0::/32 - RU-SPORTEXPRESS-20140915
inet6num: 2a03:34e0::/32 netname: RU-SPORTEXPRESS-20140915 org: ORG-CA1488-RIPE country: RU admin-c: VK3846-RIPE tech-c: AB30839-RIPE mnt-routes: MNT-SPREXPR mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-SPREXPR status: ALLOCATED-BY-RIR created: 2014-09-15T12:03:31Z last-modified: 2017-12-15T09:32:32Z source: RIPE organisation: ORG-CA1488-RIPE org-name: CJSC Sport-Express org-type: LIR address: Krasina, 27/2 address: 123056 address: Moscow address: RUSSIAN FEDERATION phone: +74992548836 fax-no: +74992548836 e-mail: email@example.com abuse-c: AR35183-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: MNT-SPREXPR mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-SPREXPR created: 2014-09-12T10:24:27Z last-modified: 2017-12-15T09:32:33Z source: RIPE admin-c: AB30839-RIPE admin-c: VK3846-RIPE person: Aleksandr Bashkirov address: CJSC Sport-Express address: Krasina str, d.27, str.2 address: Moscow, Russia, 123056 phone: +7 495 796 9148 fax-no: +7 499 254 8836 e-mail: firstname.lastname@example.org nic-hdl: AB30839-RIPE mnt-by: MNT-SPREXPR created: 2014-09-12T16:17:09Z last-modified: 2014-09-12T16:17:09Z source: RIPE person: Vsevolod Krivosheev address: CJSC Sport-Express address: Krasina str, d.27, str.2 address: Moscow, Russia, 123056 phone: +7 495 796 9148 fax-no: +7 499 254 8836 e-mail: email@example.com nic-hdl: VK3846-RIPE mnt-by: MNT-SPREXPR created: 2014-09-12T16:14:44Z last-modified: 2014-09-12T16:14:44Z source: RIPE route6: 2a03:34e0::/32 descr: CJSC Sport-Express origin: AS12695 mnt-by: DN-MNT created: 2017-12-14T17:41:23Z last-modified: 2017-12-14T17:41:23Z 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.