inet6num: 2a00,9300,,/32 netname: DE-IS-FUN-20110215 country: DE org: ORG-IIS1-RIPE admin-c: RF255-RIPE tech-c: RF255-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: ISFUN-MNT mnt-routes: ISFUN-MNT mnt-routes: TXX-MNT notify: firstname.lastname@example.org created: 2011-02-15T13,58,23Z last-modified: 2016-09-29T14,31,07Z source: RIPE organisation: ORG-IIS1-RIPE org-name: IS-Fun Internet Services org-type: LIR address: Badhausweg 8 address: 76307 address: Karlsbad address: GERMANY phone: +49 7248 932763 fax-no: +49 7248 932765 e-mail: email@example.com admin-c: SD605-RIPE admin-c: RF255-RIPE mnt-ref: ISFUN-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: ISFUN-MNT abuse-c: IH1468-RIPE created: 2004-04-17T11,08,59Z last-modified: 2016-10-06T15,26,17Z source: RIPE person: Robin Fundinger address: IS-FUN Internet Services address: Badhausweg 8 address: D-76307 Karlsbad address: Germany phone: +49 7248 932763 fax-no: +49 7248 932765 e-mail: firstname.lastname@example.org nic-hdl: RF255-RIPE remarks: same person as FF254-RIPE (960806) notify: email@example.com mnt-by: DENIC-P created: 1970-01-01T00,00,00Z last-modified: 2001-09-22T06,12,26Z source: RIPE route6: 2a00,9300,,/32 descr: ISFUN via TelemaxX origin: AS12843 mnt-by: TXX-MNT created: 2013-04-12T13,31,38Z last-modified: 2013-04-12T13,31,38Z 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.