inet6num: 2001,67c,2bac,,/48 netname: HOERBIGER-PI-NET country: DE org: ORG-HDHG1-RIPE admin-c: HR2838-RIPE tech-c: HR2838-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: DTAG-NIC mnt-by: HOERBIGER-MNT mnt-routes: LEWTELNET-MNT mnt-domains: HOERBIGER-MNT created: 2013-09-16T09,19,32Z last-modified: 2016-04-14T08,30,14Z source: RIPE sponsoring-org: ORG-DTA2-RIPE organisation: ORG-HDHG1-RIPE org-type: OTHER org-name: HOERBIGER Deutschland Holding GmbH address: Martina-Hörbiger-Straße 5 address: D-86956 Schongau, Germany e-mail: email@example.com abuse-c: AR23463-RIPE mnt-ref: DTAG-NIC mnt-by: DTAG-NIC created: 2013-09-04T10,53,56Z last-modified: 2014-11-17T16,30,42Z source: RIPE person: Helmut Ritter address: HOERBIGER Deutschland Holding GmbH address: Martina-Hoerbiger-Straße 5 address: 86956 Schongau, Germany address: DE phone: +49 8861 210 3920 e-mail: firstname.lastname@example.org nic-hdl: HR2838-RIPE notify: email@example.com mnt-by: DTAG-NIC created: 2013-09-10T13,06,52Z last-modified: 2013-09-11T10,41,32Z source: RIPE route6: 2001,67c,2bac,,/48 descr: HOERBIGER Deutschland Holding GmbH origin: AS12886 mnt-by: LEWTELNET-MNT created: 2014-01-28T15,45,12Z last-modified: 2014-01-28T15,45,12Z 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.