inet6num: 2001,67c,1174,,/48 netname: CAPERIO-NET country: SE org: ORG-CAPE1-RIPE admin-c: STLE-RIPE tech-c: STLE-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: caperio-mnt mnt-routes: caperio-mnt mnt-routes: IP-ONLY-MNT mnt-domains: caperio-mnt created: 2012-12-21T13,41,05Z last-modified: 2016-04-14T08,44,30Z source: RIPE sponsoring-org: ORG-RESI1-RIPE organisation: ORG-CAPE1-RIPE org-name: Caperio AB org-type: OTHER abuse-c: ABUS2718-RIPE address: Caperio AB address: Box 11105 address: SE-161 11 Bromma address: Sweden e-mail: firstname.lastname@example.org e-mail: email@example.com admin-c: STLE-RIPE mnt-by: RESILANS-MNT mnt-ref: RESILANS-MNT created: 2012-12-18T15,11,42Z last-modified: 2015-10-29T15,38,20Z source: RIPE person: Stefan Lemming address: Caperio AB address: Fabriksgatan 22 address: 702 23 Örebro address: SWEDEN phone: +46 19 769 1965 e-mail: firstname.lastname@example.org nic-hdl: STLE-RIPE mnt-by: stle-mnt created: 2012-11-20T18,22,25Z last-modified: 2014-10-23T07,58,02Z source: RIPE route6: 2001,67c,1174,,/48 descr: IP-ONLY origin: AS12552 mnt-by: IP-ONLY-MNT created: 2013-01-22T13,00,45Z last-modified: 2013-01-22T13,00,45Z 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.