inet6num: 2a00,14b0,,/29 netname: DE-CREW-20091012 country: DE org: ORG-WCG4-RIPE admin-c: IRZ42-RIPE tech-c: IRZ42-RIPE status: ALLOCATED-BY-RIR notify: email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: CREW-MNT mnt-lower: CREW-MNT mnt-routes: CREW-MNT created: 2016-05-10T11,00,19Z last-modified: 2016-06-09T09,37,59Z source: RIPE organisation: ORG-WCG4-RIPE org-name: Wieske's Crew GmbH org-type: LIR address: Suederstrasse 195 address: 20537 address: HAMBURG address: GERMANY phone: +494025300720 fax-no: +494025300722 e-mail: firstname.lastname@example.org admin-c: IRZ42-RIPE abuse-c: IRZ42-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: CREW-MNT abuse-mailbox: email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: CREW-MNT created: 2006-01-03T12,10,42Z last-modified: 2016-06-09T09,37,56Z source: RIPE role: IRZ42.NET Hostmaster Role Account address: Wieske's Crew GmbH address: Suederstrasse 195 address: D-20537 Hamburg address: Germany phone: +49 40 25300720 fax-no: +49 40 25300722 e-mail: firstname.lastname@example.org abuse-mailbox: email@example.com notify: firstname.lastname@example.org remarks: Work days 0900-1900 CET remarks: Other hours, Try email to email@example.com admin-c: THW-RIPE admin-c: FA-RIPE admin-c: MB14-RIPE admin-c: DS6306-RIPE tech-c: THW-RIPE tech-c: FA-RIPE tech-c: MB14-RIPE tech-c: DS6306-RIPE nic-hdl: IRZ42-RIPE mnt-by: CREW-MNT created: 2010-08-11T11,53,40Z last-modified: 2015-03-20T13,46,18Z 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.