inet6num: 2001,67c,168,,/48 netname: BNC-P1-IPV6 country: CH org: ORG-BBNC1-RIPE admin-c: PS4653-RIPE tech-c: PS4653-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-routes: VTX-MNT created: 2010-02-22T11,08,29Z last-modified: 2016-10-17T11,10,11Z source: RIPE sponsoring-org: ORG-VA3-RIPE organisation: ORG-BBNC1-RIPE org-name: BNC Business Network Communications AG org-type: OTHER address: Grubenstrasse 7b address: CH-3322 Urtenen-Schoenbuehl address: Switzerland phone: +41 31 858 58 58 fax-no: +41 31 858 58 50 e-mail: firstname.lastname@example.org abuse-c: AR29757-RIPE admin-c: PS4653-RIPE tech-c: PS4653-RIPE ref-nfy: email@example.com mnt-ref: ONENET-MNT mnt-by: BNC_CH-MNT created: 2004-12-16T09,55,22Z last-modified: 2014-11-17T22,44,14Z source: RIPE person: Patrik Schilt address: BNC Business Network Communications AG address: Grubenstrasse 7b address: CH-3322 Urtenen-Schoenbuehl phone: +41 31 858 58 58 fax-no: +41 31 858 58 50 e-mail: firstname.lastname@example.org nic-hdl: PS4653-RIPE mnt-by: BNC_CH-MNT created: 2004-12-16T09,50,02Z last-modified: 2005-01-20T15,47,39Z source: RIPE route6: 2001,67c,168,,/48 origin: AS12350 mnt-by: VTX-MNT created: 2016-08-06T13,22,40Z last-modified: 2016-08-06T13,22,40Z 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.