inet6num: 2001,67c,148,,/48 netname: NET-OOELR descr: Government of Upper Austria remarks: Subprovider allocations org: ORG-OA388-RIPE country: AT admin-c: GS268 tech-c: GS268 tech-c: WH844-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-domains: AS12991-MNT mnt-by: AS12991-MNT created: 2010-02-05T15,11,16Z last-modified: 2016-04-14T10,13,40Z source: RIPE sponsoring-org: ORG-AA1-RIPE organisation: ORG-OA388-RIPE org-name: Amt der OOe Landesregierung org-type: OTHER address: OOELR Amt der OOe Landesregierung address: Government of Upper Austria address: Kaerntner Strasse 16 address: A-4020 Linz, Austria phone: +43 732 7720 13044 fax-no: +43 732 7720 21 32 55 e-mail: firstname.lastname@example.org admin-c: GS268 tech-c: GS268 abuse-c: AAR120-RIPE mnt-ref: AS12991-MNT mnt-by: AS12991-MNT mnt-by: ACONET-LIR-MNT created: 2011-04-12T07,38,46Z last-modified: 2014-04-28T10,36,45Z source: RIPE person: Guenther Schmittner address: Amt der OOe Landesregierung address: Praesidium - Abt. IT address: Kaerntnerstrasse 16 address: A-4020 Linz address: Austria mnt-by: AS12991-MNT phone: +43 732 7720.13044 fax-no: +43 732 7720.213198 e-mail: Guenther.Schmittner@OOE.GV.AT nic-hdl: GS268 created: 1970-01-01T00,00,00Z last-modified: 2012-01-04T12,51,08Z source: RIPE person: Wolfgang Hennerbichler address: Department of the Upper address: Austria Federal State Government address: Kaerntner Strasse 16 address: A-4020 Linz address: Austria phone: +43 7720 13195 fax-no: +43 7720 213255 e-mail: email@example.com nic-hdl: WH844-RIPE remarks: GPG-Key, PGPKEY-0B196630 # used for DB transactions mnt-by: AS12991-MNT mnt-by: ACONET-LIR-MNT created: 2005-09-14T12,10,51Z last-modified: 2011-04-12T07,43,13Z source: RIPE route6: 2001,67c,148,,/48 descr: NET-OOELR origin: AS12991 mnt-by: AS12991-MNT created: 2011-04-12T06,52,33Z last-modified: 2011-04-12T06,52,33Z 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.