inet6num: 2a02,ff0,2600,,/40 netname: IcelPop_Customers descr: TurkNet Iletisim Hizmetleri A.S country: TR admin-c: TL143-RIPE tech-c: TL143-RIPE status: ALLOCATED-BY-LIR org: ORG-SN10-RIPE mnt-by: MNT-TURKNET-MNT created: 2013-06-21T12,24,19Z last-modified: 2013-06-21T12,24,19Z source: RIPE organisation: ORG-SN10-RIPE org-name: TurkNet Iletisim Hizmetleri A.S org-type: LIR address: Buyukdere Cad. No121 Ercan Han Kat 2 address: 34394 address: Istanbul address: TURKEY phone: +90 212 355 1700 fax-no: +90 212 216 3939 e-mail: email@example.com admin-c: MT15110-RIPE admin-c: AE363-RIPE admin-c: NC214-RIPE abuse-c: AR17381-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: MNT-TURKNET-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-TURKNET-MNT created: 2004-04-17T12,08,04Z last-modified: 2016-08-18T05,58,03Z source: RIPE person: TurkNet LIR address: TurkNet Iletisim Hizmetleri A.S. address: Buyukdere Cad. Ercan Han No.121 address: Gayrettepe / Istanbul / Turkey phone: +90 212 355 17 00 nic-hdl: TL143-RIPE created: 2009-03-05T10,03,41Z last-modified: 2011-08-24T12,18,33Z source: RIPE mnt-by: MNT-TURKNET-MNT route6: 2a02,ff0,2600,,/40 descr: TurkNet Iletisim Hizmetleri A.S origin: AS12735 mnt-by: MNT-TURKNET-MNT created: 2013-06-21T12,37,27Z last-modified: 2013-06-21T12,37,27Z 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.