inet6num: 2001,bf0,,/29 netname: DE-BBTT-20030508 country: DE org: ORG-bEN1-RIPE admin-c: EP45-RIPE tech-c: AS33-RIPE tech-c: MB72-RIPE status: ALLOCATED-BY-RIR notify: email@example.com notify: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: ALL-MNT mnt-lower: ALL-MNT mnt-routes: ALL-MNT created: 2014-01-15T13,25,52Z last-modified: 2016-06-06T14,43,23Z source: RIPE organisation: ORG-bEN1-RIPE org-name: D-hosting die Rackspace & Connectivity GmbH org-type: LIR address: Stromstrasse 5 address: 10555 address: Berlin address: GERMANY phone: +493039001600 fax-no: +493039001699 e-mail: email@example.com admin-c: AS33-RIPE admin-c: MB72-RIPE admin-c: EP45-RIPE abuse-c: AR13457-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: ALL-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: ALL-MNT created: 2004-04-17T11,05,34Z last-modified: 2016-06-06T14,43,19Z source: RIPE person: Alfred Schweder address: Offenwardenermoor 14 address: D-27628 Sandstedt address: Germany phone: +49 30 52004 3328 phone: +49 177 219 4627 fax-no: +49 30 52004 3329 e-mail: firstname.lastname@example.org abuse-mailbox: email@example.com nic-hdl: AS33-RIPE mnt-by: ALL-MNT created: 1970-01-01T00,00,00Z last-modified: 2013-11-13T23,43,30Z source: RIPE person: Emilio Paolini address: Emilio Paolini address: Kaiserin-Augusta-Allee 10-11 address: D-10553 Berlin address: Germany phone: +49 30 4511000 fax-no: +49 30 4519037 e-mail: firstname.lastname@example.org nic-hdl: EP45-RIPE notify: email@example.com mnt-by: ABALL-NCC-MNT created: 2002-07-16T10,33,11Z last-modified: 2002-07-16T10,33,11Z source: RIPE person: Michael Baudinne address: beehive elektronische medien GmbH address: Fischerhuettenstr. 79b address: D-14163 Berlin address: Germany phone: +49 30 847820 fax-no: +49 30 84782299 e-mail: firstname.lastname@example.org nic-hdl: MB72-RIPE mnt-by: HOSTEUROPE-MNT created: 1970-01-01T00,00,00Z last-modified: 2009-11-18T13,43,51Z source: RIPE route6: 2001,bf0,,/29 descr: D-Hosting GmbH origin: AS12732 mnt-by: ALL-MNT created: 2014-01-15T14,23,58Z last-modified: 2014-01-15T14,23,58Z source: RIPE route6: 2001,bf0,,/29 descr: D-Hosting GmbH origin: AS44716 mnt-by: ALL-MNT created: 2014-01-15T14,23,58Z last-modified: 2014-01-15T14,23,58Z 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.