2a03:8a80::/32 - AT-CARDCOMPLETE-20111006
inet6num: 2a03,8a80,,/32 netname: AT-CARDCOMPLETE-20111006 country: AT org: ORG-ccSB2-RIPE admin-c: AK6461-RIPE tech-c: ccID1-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: CARDCOMPLETE-MNT mnt-routes: CARDCOMPLETE-MNT notify: email@example.com created: 2011-10-06T08,25,25Z last-modified: 2017-06-26T04,56,40Z source: RIPE organisation: ORG-ccSB2-RIPE org-name: card complete Service Bank AG org-type: LIR address: Lassallestrasse 3 address: 1020 address: Wien address: AUSTRIA e-mail: firstname.lastname@example.org abuse-c: AR13534-RIPE mnt-ref: CARDCOMPLETE-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: CARDCOMPLETE-MNT created: 2011-09-15T09,40,00Z last-modified: 2017-07-10T05,38,53Z source: RIPE phone: +43171111232 fax-no: +43171111232 admin-c: BS7472-RIPE role: card complete IT Department address: card complete Service Bank AG address: Invalidenstrasse 2 address: A-1030 Wien address: Austria phone: +43 1 711 11 0 e-mail: email@example.com admin-c: AK6461-RIPE admin-c: AB22911-RIPE tech-c: OK1291-RIPE nic-hdl: ccID1-RIPE abuse-mailbox: firstname.lastname@example.org mnt-by: CARDCOMPLETE-MNT created: 2010-07-05T18,55,24Z last-modified: 2012-02-24T20,10,25Z source: RIPE person: Adolf KOERBEL address: card complete Service Bank AG address: Invalidenstrasse 2 address: A-1030 Wien phone: +43 1 711 11 0 e-mail: email@example.com nic-hdl: AK6461-RIPE created: 2010-07-05T18,53,44Z last-modified: 2010-07-05T19,20,17Z source: RIPE mnt-by: CARDCOMPLETE-MNT route6: 2a03,8a80,,/32 descr: card complete Service Bank AG origin: AS12930 mnt-by: CARDCOMPLETE-MNT created: 2012-02-28T12,48,35Z last-modified: 2012-02-28T12,48,35Z 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.