inet6num: 2a02,920,,/32 netname: SE-LEISSNER-20090122 country: SE org: ORG-LDA2-RIPE admin-c: PF96 tech-c: GR279-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: LEISSNER-MNT mnt-routes: Leissner-mnt notify: email@example.com created: 2009-01-22T15,26,51Z last-modified: 2017-01-22T12,27,31Z source: RIPE organisation: ORG-LDA2-RIPE org-name: Leissner Data AB org-type: LIR address: Registry Box 912 address: 46129 address: Trollhattan address: SWEDEN phone: +46 520 30000 fax-no: +46 520 30089 e-mail: firstname.lastname@example.org admin-c: PF96 admin-c: PO362 mnt-ref: LEISSNER-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: LEISSNER-MNT abuse-mailbox: email@example.com abuse-c: LDCR1-RIPE created: 2004-04-17T12,03,55Z last-modified: 2017-01-22T12,27,36Z source: RIPE person: Gotanet Registry address: Gotalandsnatet AB (Gotanet) address: Box 912 address: 461 21 Trollhattan address: Sweden phone: +46 520 300 00 fax-no: +46 520 300 89 e-mail: firstname.lastname@example.org nic-hdl: GR279-RIPE mnt-by: RESILANS-MNT created: 2002-01-04T14,58,46Z last-modified: 2013-05-31T11,48,38Z source: RIPE person: Peter Fassberg address: Leissner Data AB address: Box 912 address: 46129 Trollhattan address: Sweden phone: +46 520 300 00 fax-no: +46 520 300 89 e-mail: email@example.com nic-hdl: PF96 mnt-by: LEISSNER-MNT created: 1970-01-01T00,00,00Z last-modified: 2009-01-28T13,03,30Z source: RIPE route6: 2a02,920,,/32 descr: Leissner-IPV6-1 origin: AS12597 mnt-by: LEISSNER-MNT notify: firstname.lastname@example.org created: 2011-05-05T08,30,47Z last-modified: 2011-05-05T10,22,08Z 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.