inet6num: 2001,67c,2738,,/48 netname: NETWORKGODS country: GB org: ORG-JE12-RIPE admin-c: BJE-RIPE tech-c: BJE-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: JACOENGELBRECHT-MNT mnt-routes: JACOENGELBRECHT-MNT mnt-domains: JACOENGELBRECHT-MNT notify: firstname.lastname@example.org created: 2012-02-27T12,43,23Z last-modified: 2016-04-14T08,30,22Z source: RIPE sponsoring-org: ORG-CA48-RIPE organisation: ORG-JE12-RIPE org-name: JACO ENGELBRECHT org-type: OTHER address: NetworkGods, London e-mail: email@example.com abuse-c: AR20631-RIPE mnt-ref: JACOENGELBRECHT-MNT mnt-by: JACOENGELBRECHT-MNT created: 2010-07-13T09,43,24Z last-modified: 2014-04-14T14,33,50Z source: RIPE person: Jaco Engelbrecht address: NetworkGods, London e-mail: firstname.lastname@example.org nic-hdl: BJE-RIPE phone: +44 77388 31199 mnt-by: JACOENGELBRECHT-MNT created: 2006-10-02T14,59,08Z last-modified: 2012-02-24T20,49,30Z source: RIPE route6: 2001,67c,2738,,/48 descr: NETWORKGODS origin: AS12628 mnt-by: JACOENGELBRECHT-MNT created: 2012-02-27T16,31,51Z last-modified: 2012-02-27T16,31,51Z 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.