inet6num: 2a00,1910,,/29 netname: DE-ISP4P-20091231 country: DE org: ORG-IIS11-RIPE admin-c: OD250-RIPE tech-c: OD250-RIPE status: ALLOCATED-BY-RIR notify: email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: IPI mnt-lower: ISP4P-MNT mnt-lower: IPI mnt-routes: ISP4P-MNT created: 2014-09-22T14,28,44Z last-modified: 2016-09-15T16,28,24Z source: RIPE organisation: ORG-IIS11-RIPE org-name: ISP4P IT Services org-type: LIR address: BORNWIESENWEG 12 address: 63599 address: BIEBERGEMUEND address: GERMANY phone: +4917622523306 fax-no: +496050912539 e-mail: firstname.lastname@example.org admin-c: OD250-RIPE abuse-c: AR14621-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: IPI mnt-by: RIPE-NCC-HM-MNT mnt-by: IPI created: 2004-12-07T13,52,20Z last-modified: 2016-10-17T10,58,49Z source: RIPE person: Oliver Dzombic address: IP Interactive Zum Sonnenberg 1-3 63571 Gelnhausen DE phone: +49-6050-912539 fax-no: +49-6050-912539 e-mail: email@example.com nic-hdl: OD250-RIPE mnt-by: ISP4P-MNT created: 2003-02-25T12,18,54Z last-modified: 2016-03-18T21,41,56Z source: RIPE route6: 2a00,1910,,/29 descr: IP Interactive origin: AS12586 mnt-by: IPI created: 2015-06-20T10,33,00Z last-modified: 2015-06-20T10,33,00Z 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.