inet6num: 2001,67c,240c,,/48 netname: SE-JORDBRUK country: SE org: ORG-SJ14-RIPE sponsoring-org: ORG-RESI1-RIPE admin-c: UP600-RIPE tech-c: Dos23-RIPE notify: firstname.lastname@example.org status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: RESILANS-MNT mnt-by: jordbruksverket-mnt mnt-routes: jordbruksverket-mnt mnt-routes: IP-ONLY-MNT mnt-domains: RESILANS-MNT created: 2011-08-11T13,23,32Z last-modified: 2016-04-14T08,43,09Z source: RIPE organisation: ORG-SJ14-RIPE org-name: Statens Jordbruksverk descr: Statens Jordbruksverk org-type: OTHER address: Vallgatan 8 address: 55182 Jonkoping address: Sweden e-mail: email@example.com abuse-c: AR18198-RIPE admin-c: Dos23-RIPE mnt-ref: jordbruksverket-mnt mnt-by: jordbruksverket-mnt created: 2011-02-18T06,31,02Z last-modified: 2014-01-30T12,24,33Z source: RIPE role: Drift- och supportenheten address: Statens Jordbruksverk address: Vallgatan 8 address: 55182 Jonkoping address: Sweden e-mail: firstname.lastname@example.org admin-c: UP600-RIPE tech-c: UP600-RIPE tech-c: MK16728-RIPE nic-hdl: Dos23-RIPE mnt-by: jordbruksverket-mnt created: 2011-02-18T07,01,56Z last-modified: 2014-09-09T08,22,45Z source: RIPE person: Urban Petren address: Vallagatan 8 address: 551 82 Jonkoping phone: +46(0)36 - 15 50 00 e-mail: email@example.com nic-hdl: UP600-RIPE mnt-by: jordbruksverket-mnt created: 2011-02-17T14,05,25Z last-modified: 2011-02-18T06,18,14Z source: RIPE route6: 2001,67c,240c,,/48 descr: IP-ONLY origin: AS12552 mnt-by: IP-ONLY-MNT created: 2014-09-29T12,02,14Z last-modified: 2014-09-29T12,02,14Z 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.