inet6num: 2a06,2ec0,,/29 netname: NL-STICHTING-DIGI-NL-20150611 country: NL org: ORG-SDN4-RIPE admin-c: MG21095-RIPE tech-c: MG21095-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: nl-stichting-digi-nl-1-mnt mnt-routes: nl-stichting-digi-nl-1-mnt mnt-routes: BIT-MNT created: 2015-06-11T11,33,34Z last-modified: 2017-02-17T20,11,54Z source: RIPE organisation: ORG-SDN4-RIPE org-name: Stichting DIGI NL org-type: LIR address: Hoogoorddreef 9 address: 1101BA address: 1101BA address: NETHERLANDS e-mail: email@example.com admin-c: MG21095-RIPE tech-c: MG21095-RIPE abuse-c: AR32435-RIPE mnt-ref: nl-stichting-digi-nl-1-mnt mnt-by: RIPE-NCC-HM-MNT mnt-by: nl-stichting-digi-nl-1-mnt mnt-ref: RIPE-NCC-HM-MNT created: 2015-06-10T08,33,22Z last-modified: 2017-02-17T20,11,55Z source: RIPE phone: +31203120400 person: M. Gerritsen address: Hoogoorddreef 9 address: 1101BA address: 1101BA address: NETHERLANDS phone: +310203120400 nic-hdl: MG21095-RIPE mnt-by: nl-stichting-digi-nl-1-mnt created: 2015-06-10T08,33,21Z last-modified: 2015-06-10T08,33,21Z source: RIPE route6: 2a06,2ec0,,/29 descr: Stichting DIGI NL origin: AS12859 notify: firstname.lastname@example.org mnt-by: BIT-MNT created: 2015-06-18T08,34,19Z last-modified: 2015-06-18T08,34,19Z 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.