2a01:5b40:ac2::/48 - NO-DOMENESHOP-20120608
inet6num: 2a01,5b40,,/32 netname: NO-DOMENESHOP-20120608 country: NO org: ORG-DA421-RIPE admin-c: SS19786-RIPE tech-c: SS19786-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: DOMENESHOP-MNT mnt-routes: DOMENESHOP-MNT notify: email@example.com created: 2012-06-08T06,30,36Z last-modified: 2017-01-02T12,00,14Z source: RIPE organisation: ORG-DA421-RIPE org-name: Domeneshop AS org-type: LIR address: Christian Krohgs gate 16 address: 0186 address: Oslo address: NORWAY phone: +4722943333 fax-no: +4722943334 e-mail: firstname.lastname@example.org mnt-ref: DOMENESHOP-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: DOMENESHOP-MNT abuse-c: HH2777-RIPE created: 2012-06-07T11,55,20Z last-modified: 2017-01-02T12,00,21Z source: RIPE admin-c: SS19786-RIPE person: Stale Schumacher address: Domeneshop AS address: Christian Krohgs gate 16 address: 0186 Oslo address: Norway phone: +47 900 86 393 fax-no: +47 22 94 33 34 e-mail: email@example.com nic-hdl: SS19786-RIPE mnt-by: DOMENESHOP-MNT created: 2012-06-07T12,47,02Z last-modified: 2013-04-19T13,32,00Z source: RIPE route6: 2a01,5b40,,/32 descr: DOMENESHOP origin: AS12996 mnt-by: AS12996-MNT created: 2012-06-10T20,40,29Z last-modified: 2012-06-10T20,40,29Z 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.