inet6num: 2001,67c,189c,,/48 netname: SOC-SE country: SE org: ORG-SA1399-RIPE admin-c: JZ1724-RIPE tech-c: JZ1724-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: SWIPNET-LIR-MNT mnt-routes: SWIPNET-LIR-MNT mnt-domains: SWIPNET-LIR-MNT created: 2013-10-29T15,24,48Z last-modified: 2016-04-14T10,13,27Z source: RIPE sponsoring-org: ORG-TA44-RIPE organisation: ORG-SA1399-RIPE org-name: Socialstyrelsen org-type: OTHER address: Ralambsvägen 3, 11259 Stockholm e-mail: firstname.lastname@example.org abuse-c: AR27854-RIPE admin-c: SWIP-RIPE tech-c: SWIP-RIPE ref-nfy: email@example.com mnt-ref: SWIPNET-LIR-MNT mnt-by: SWIPNET-LIR-MNT created: 2013-10-24T11,07,43Z last-modified: 2014-11-17T22,33,18Z source: RIPE person: JAN ZACKRISSON address: SOCIALSTYRELSEN address: 106 30 STOCKHOLM address: SWEDEN address: SE e-mail: firstname.lastname@example.org phone: +46.752473000 fax-no: +46.752473252 nic-hdl: JZ1724-RIPE mnt-by: SWIPNET-LIR-MNT created: 2013-10-29T14,54,40Z last-modified: 2013-10-29T14,54,40Z 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.