inet6num: 2a00,1e88,7,,/48 netname: RTK-VOLGA-MRF-IPv6-SAMARA descr: OJSC Rostelecom descr: IP address space for Samara Branch country: RU admin-c: YVN4-RIPE admin-c: ANS63-RIPE admin-c: AAK17-RIPE tech-c: YVN4-RIPE tech-c: ANS63-RIPE tech-c: AAK17-RIPE status: ASSIGNED notify: email@example.com notify: firstname.lastname@example.org mnt-by: MNT-VOLGATELECOM mnt-lower: SAMTEL-MNT mnt-routes: SAMTEL-MNT mnt-domains: SAMTEL-MNT created: 2012-04-05T10,02,39Z last-modified: 2012-04-05T10,13,47Z source: RIPE person: Alexandr A Kolesnikov address: 54, Michurina address: 443010 Samara City address: Russia phone: +7 846 2638684 mnt-by: SAMTEL-MNT nic-hdl: AAK17-RIPE created: 2009-02-20T09,32,53Z last-modified: 2009-02-20T09,32,53Z source: RIPE person: Andrey N. Starkin address: 54, Michurina address: 443010 Samara City address: Russia phone: +7 846 2638684 nic-hdl: ANS63-RIPE mnt-by: SAMTEL-MNT created: 2007-03-27T07,32,48Z last-modified: 2007-03-27T07,32,48Z source: RIPE person: Yury V. Nazarov address: 54, Michurina address: 443010 Samara City address: Russia phone: +7 846 2638684 fax-no: +7 846 2637235 e-mail: email@example.com nic-hdl: YVN4-RIPE mnt-by: SAMTEL-MNT created: 2007-02-01T14,38,24Z last-modified: 2007-04-25T03,49,23Z source: RIPE route6: 2a00,1e88,,/32 descr: OJSC Rostelecom-Volga, Multiregional service network descr: Autonomous System origin: AS43975 pingable: 2a00,1e88,e,,4 pingable: 2a00,1e88,e,,5 ping-hdl: OVNO2-RIPE mnt-by: MNT-VOLGATELECOM notify: firstname.lastname@example.org created: 2013-03-12T12,42,41Z last-modified: 2013-03-12T12,42,41Z source: RIPE role: OJSC VolgaTelecom Network Operational Center address: OJSC Rostelecom, Macroregion Volga address: Dom Sviazy, M.Gorkiy Square address: Nizhny Novgorod, 603000 address: Russian Federation e-mail: email@example.com admin-c: AVO12-RIPE tech-c: AVO12-RIPE mnt-by: MNT-VOLGATELECOM nic-hdl: OVNO2-RIPE created: 2010-02-17T13,04,46Z last-modified: 2015-11-12T09,58,10Z 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.