inet6num: 2a05,92c0,,/29 netname: NL-ITONSERVICES-20141230 country: NL org: ORG-ISB9-RIPE admin-c: ISRA3-RIPE tech-c: ISRA3-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: ITONSERVICES-MNT mnt-lower: ITONSERVICES-MNT mnt-routes: ITONSERVICES-MNT mnt-routes: BIT-MNT created: 2014-12-30T13,36,51Z last-modified: 2016-05-31T19,00,35Z source: RIPE organisation: ORG-ISB9-RIPE org-name: ITON Services B.V. org-type: LIR address: Vendelier 2D address: 3905 PA address: Veenendaal address: NETHERLANDS phone: +31880700695 e-mail: email@example.com admin-c: IY47-RIPE abuse-c: ISRA3-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: ITONSERVICES-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: ITONSERVICES-MNT created: 2014-12-30T10,32,46Z last-modified: 2016-08-29T08,15,33Z source: RIPE role: ITON Services Role Account address: Landjuweel 20 address: 3905 PG Veenendaal e-mail: firstname.lastname@example.org abuse-mailbox: email@example.com nic-hdl: ISRA3-RIPE tech-c: BI986-RIPE mnt-by: ITONSERVICES-MNT created: 2015-01-05T10,51,34Z last-modified: 2016-08-29T08,20,17Z source: RIPE route6: 2a05,92c0,,/29 descr: ITON origin: AS12859 notify: firstname.lastname@example.org mnt-by: BIT-MNT created: 2015-01-05T14,28,48Z last-modified: 2015-01-05T14,28,48Z 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.