2001:67c:2388::/48 - DISY-6NET
inet6num: 2001,67c,2388,,/48 netname: DISY-6NET country: DE org: ORG-dIG7-RIPE admin-c: CH3007-RIPE tech-c: CH3007-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: DISY-MNT mnt-by: TXX-MNT mnt-routes: DISY-MNT mnt-routes: TXX-MNT mnt-domains: DISY-MNT created: 2011-07-12T14,32,41Z last-modified: 2016-04-14T08,39,30Z source: RIPE sponsoring-org: ORG-NGs2-RIPE organisation: ORG-dIG7-RIPE org-name: disy Informationssysteme GmbH org-type: OTHER address: Ludwig-Erhard-Allee 6, 76133 Karlsruhe, Germany e-mail: firstname.lastname@example.org abuse-c: AR21408-RIPE mnt-ref: DISY-MNT mnt-by: DISY-MNT created: 2011-07-12T08,07,16Z last-modified: 2014-07-22T10,41,01Z source: RIPE person: Claus Hofmann address: disy Informationssysteme GmbH address: Erbprinzenstrasse 4-12 address: Eingang B address: D-76133 Karlsruhe address: DE phone: +49 721 1600 6000 fax-no: +49 721 1600 605 e-mail: email@example.com nic-hdl: CH3007-RIPE mnt-by: TXX-MNT created: 2011-04-21T12,47,16Z last-modified: 2011-04-21T12,47,16Z source: RIPE route6: 2001,67c,2388,,/48 descr: disy Informationssysteme GmbH origin: AS12843 mnt-by: TXX-MNT created: 2013-10-10T12,06,24Z last-modified: 2013-10-10T12,06,24Z source: RIPE route6: 2001,67c,2388,,/48 descr: route object origin: AS43257 mnt-by: DISY-MNT mnt-by: TXX-MNT created: 2011-08-04T11,16,43Z last-modified: 2013-10-05T08,09,04Z 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.