inet6num: 2a03,7520,,/32 netname: CH-ENIDAN-20150127 country: CH org: ORG-ETG6-RIPE admin-c: oh1431-ripe tech-c: oh1431-ripe status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-ENIDAN mnt-routes: mnt-enidan mnt-domains: mnt-enidan created: 2015-01-27T10,51,04Z last-modified: 2017-09-05T06,50,59Z source: RIPE organisation: ORG-ETG6-RIPE org-name: ENIDAN Technologies GmbH org-type: LIR address: Bergstrasse 170 address: CH-8704 address: Herrliberg address: SWITZERLAND phone: +41449144200 fax-no: +41449144210 e-mail: email@example.com abuse-c: AC28110-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: mnt-enidan mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-ENIDAN created: 2015-01-12T15,00,30Z last-modified: 2017-09-05T06,50,59Z source: RIPE role: Operations Herrliberg address: Bergstrasse 170, 8704 Herrliberg e-mail: firstname.lastname@example.org nic-hdl: OH1431-RIPE mnt-by: MNT-ENIDAN created: 2015-01-26T12,59,52Z last-modified: 2015-01-26T13,15,53Z source: RIPE admin-c: PJ3879-RIPE abuse-mailbox: email@example.com route6: 2a03,7520,,/32 descr: ENI DAN Technologies GmbH origin: AS13030 mnt-by: MNT-INIT7-NOC created: 2015-03-05T15,01,07Z last-modified: 2015-03-05T15,01,07Z 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.