inet6num: 2a04,c580,,/29 netname: NL-QSP-20140327 country: NL org: ORG-QSPB1-RIPE admin-c: QSP tech-c: QSP status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-QSP mnt-routes: MNT-QSP notify: email@example.com created: 2014-03-27T08,56,07Z last-modified: 2017-07-20T13,38,33Z source: RIPE organisation: ORG-QSPB1-RIPE org-name: Quality Service Provider BV org-type: LIR address: Postbus 9340 address: 5000 HH address: TILBURG address: NETHERLANDS phone: +31135810451 fax-no: +31135810454 e-mail: firstname.lastname@example.org mnt-ref: RIPE-NCC-HM-MNT mnt-ref: MNT-QSP mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-QSP abuse-c: QSP created: 2007-10-01T10,49,14Z last-modified: 2017-07-20T13,38,34Z source: RIPE role: Quality Service Provider BV - QSP address: QSP Internet Services address: Postbus 9340 address: 5000 HH TILBURG address: The Netherlands phone: +31135810451 fax-no: +31135810454 e-mail: email@example.com abuse-mailbox: firstname.lastname@example.org org: ORG-QSPB1-RIPE admin-c: RB3032-RIPE tech-c: RB3032-RIPE nic-hdl: QSP mnt-by: MNT-QSP notify: email@example.com created: 2007-10-12T09,01,40Z last-modified: 2013-05-22T10,19,16Z source: RIPE route6: 2a04,c580,,/29 descr: Quality Service Provider BV origin: AS12315 mnt-by: MNT-QSP created: 2015-05-27T13,11,09Z last-modified: 2015-05-27T13,11,09Z 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.