inet6num: 2a01,7860,,/32 netname: NL-IXLHOSTING-20140110 country: NL org: ORG-CKEv1-RIPE admin-c: RE2140-RIPE tech-c: RE2140-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: iXLhosting mnt-routes: BIT-MNT notify: email@example.com created: 2014-01-10T11,59,01Z mnt-domains: iXLhosting last-modified: 2016-11-01T12,50,49Z source: RIPE organisation: ORG-CKEv1-RIPE org-name: IXL Hosting B.V. org-type: LIR address: Galvanistraat 117 address: 6716 AE address: Ede address: NETHERLANDS phone: +31318830207 e-mail: firstname.lastname@example.org abuse-c: AR16209-RIPE abuse-mailbox: email@example.com abuse-mailbox: firstname.lastname@example.org mnt-ref: RIPE-NCC-HM-MNT mnt-ref: iXLhosting remarks: Network abuse reports, email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: iXLhosting created: 2012-05-29T11,32,33Z last-modified: 2016-11-01T12,50,56Z source: RIPE person: Robert van Esseveld address: Voltastraat 1 address: 6716 AJ Ede phone: +318830207 e-mail: firstname.lastname@example.org nic-hdl: RE2140-RIPE mnt-by: iXLhosting created: 2012-06-05T12,20,25Z last-modified: 2012-06-05T12,20,26Z source: RIPE route6: 2a01,7860,,/32 descr: NL-IXLHOSTING-20140110 descr: IXL Hosting B.V. origin: AS12859 notify: email@example.com mnt-by: BIT-MNT created: 2014-01-10T12,30,32Z last-modified: 2014-01-10T12,30,32Z 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.