inet6num: 2001,67c,27fc,,/48 netname: GUTCON6-NET country: DE org: ORG-GG17-RIPE admin-c: AS33-RIPE tech-c: AS33-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: ALL-MNT mnt-routes: ALL-MNT mnt-domains: ALL-MNT created: 2012-04-10T09,57,29Z last-modified: 2016-04-14T08,30,00Z source: RIPE sponsoring-org: ORG-bEN1-RIPE organisation: ORG-GG17-RIPE org-name: GutCon GmbH org-type: OTHER address: Offenwardenermoor 14 address: 27628 Sandstedt address: Germany phone: +49 30 52004 3328 fax-no: +49 30 52004 3329 e-mail: firstname.lastname@example.org admin-c: AS33-RIPE tech-c: AS33-RIPE abuse-c: GRD22-RIPE mnt-ref: ALL-MNT mnt-by: ALL-MNT created: 2008-02-19T15,15,39Z last-modified: 2013-11-14T00,12,08Z 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: email@example.com abuse-mailbox: firstname.lastname@example.org nic-hdl: AS33-RIPE mnt-by: ALL-MNT created: 1970-01-01T00,00,00Z last-modified: 2013-11-13T23,43,30Z source: RIPE route6: 2001,67c,27fc,,/48 descr: Gutcon GmbH origin: AS12732 mnt-by: ALL-MNT created: 2012-04-10T10,12,46Z last-modified: 2012-04-12T01,15,32Z 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.