inet6num: 2a03,8900,,/32 netname: IE-NETABILITY-20110408 country: IE org: ORG-NAL6-RIPE admin-c: NANO1-RIPE tech-c: NANO1-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-lower: NETABILITY-NOC mnt-routes: NETABILITY-NOC notify: firstname.lastname@example.org created: 2011-04-08T14,05,13Z last-modified: 2016-04-14T10,21,12Z source: RIPE organisation: ORG-NAL6-RIPE org-name: Network Ability Limited org-type: LIR address: 52 Lower Sandwith Street address: 2 address: Dublin address: IRELAND phone: +35316169698 mnt-ref: NETABILITY-NOC mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT abuse-c: NANO1-RIPE created: 2010-11-16T10,06,10Z last-modified: 2016-09-29T10,59,34Z source: RIPE e-mail: email@example.com role: Network Ability Network Operations address: 52 Lower Sandwith Street, Dublin 2, Ireland e-mail: firstname.lastname@example.org phone: +353 1 6169698 admin-c: NH7 tech-c: NH7 abuse-mailbox: email@example.com nic-hdl: NANO1-RIPE mnt-by: NETABILITY-NOC created: 2010-11-16T11,34,19Z last-modified: 2014-02-13T10,06,47Z source: RIPE route6: 2a03,8900,,/32 descr: Network Ability Ltd origin: AS1197 notify: firstname.lastname@example.org mnt-by: NETABILITY-NOC created: 2011-04-17T20,11,14Z last-modified: 2011-04-17T20,11,14Z 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.