inet6num: 2a06,7880,,/29 netname: DE-ICSMEDIA-20150903 country: DE org: ORG-IG7-RIPE admin-c: IH1102-RIPE tech-c: IH1102-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: ICSMEDIA-MNT mnt-lower: ICSMEDIA-MNT mnt-routes: ICSMEDIA-MNT created: 2015-09-03T12,53,28Z last-modified: 2016-07-13T11,18,18Z source: RIPE organisation: ORG-IG7-RIPE org-name: ICSmedia GmbH org-type: LIR address: Soester Str. 13 address: 48155 address: Münster address: GERMANY phone: +49 251 60600 fax-no: +49 251 6060190 e-mail: firstname.lastname@example.org admin-c: ON391-RIPE admin-c: BT1841-RIPE admin-c: PS5341-RIPE abuse-c: IH1102-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: ICSMEDIA-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: ICSMEDIA-MNT created: 2004-04-17T11,08,16Z last-modified: 2016-07-13T11,19,02Z source: RIPE role: ICSmedia Hostmaster address: ICSmedia GmbH address: Soester Str. 13 address: 48155 Muenster address: Germany phone: +49 251 60600 fax-no: +49 251 6060190 e-mail: email@example.com abuse-mailbox: firstname.lastname@example.org admin-c: PS5341-RIPE admin-c: ON391-RIPE admin-c: BT1841-RIPE tech-c: PS5341-RIPE tech-c: ON391-RIPE tech-c: BT1841-RIPE nic-hdl: IH1102-RIPE mnt-by: ICSMEDIA-MNT created: 2011-06-17T15,36,18Z last-modified: 2015-09-15T08,02,01Z source: RIPE route6: 2a06,7880,,/29 descr: ICSmedia GmbH origin: AS12437 mnt-by: ICSMEDIA-MNT notify: email@example.com created: 2015-09-15T08,10,32Z last-modified: 2015-09-15T08,10,32Z 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.