inet6num: 2a00,5640,,/29 netname: DE-INIT7-20111208 country: DE org: ORG-IG80-RIPE admin-c: ISHM-RIPE tech-c: IGNO1-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-INIT7-DE mnt-routes: MNT-INIT7-DE notify: firstname.lastname@example.org created: 2013-02-01T09,56,55Z last-modified: 2017-03-31T10,42,18Z source: RIPE organisation: ORG-IG80-RIPE org-name: Init7 (Germany) GmbH org-type: LIR address: Technoparkstrasse 5 address: CH-8400 address: Winterthur address: SWITZERLAND e-mail: email@example.com mnt-ref: RIPE-NCC-HM-MNT mnt-ref: MNT-INIT7-DE mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-INIT7-DE admin-c: FKU-RIPE admin-c: WELL-RIPE abuse-c: ISHM-RIPE created: 2011-12-02T15,11,05Z last-modified: 2017-03-31T10,43,14Z source: RIPE phone: +41443154400 fax-no: +41443154401 role: Init7 Germany Network Operations Center address: Mainaustrasse 481 e-mail: firstname.lastname@example.org admin-c: ISHM-RIPE tech-c: ISNO-RIPE nic-hdl: IGNO1-RIPE mnt-by: MNT-INIT7-DE created: 2011-12-07T09,41,44Z last-modified: 2011-12-07T09,41,44Z source: RIPE role: Init Seven Hostmaster-Team address: Init7 (Switzerland) AG address: St. Georgen-Strasse 70 address: CH-8400 Winterthur abuse-mailbox: email@example.com phone: +41 44 315 44 00 fax-no: +41 44 315 44 01 admin-c: WELL-RIPE admin-c: LIMO-RIPE tech-c: ISNO-RIPE nic-hdl: ISHM-RIPE org: ORG-ISA1-RIPE mnt-by: MNT-INIT7-NOC created: 2003-04-29T21,01,05Z last-modified: 2013-04-17T08,36,56Z source: RIPE e-mail: firstname.lastname@example.org
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.