inet6num: 2a01,7660,,/32 netname: DE-ASTARO-20140107 country: DE org: ORG-AGCK2-RIPE admin-c: BG4140-RIPE tech-c: TE2523-RIPE status: ALLOCATED-BY-RIR notify: email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: RL42186-MNT mnt-routes: TXX-MNT created: 2014-01-07T13,58,35Z last-modified: 2016-07-05T07,40,13Z source: RIPE organisation: ORG-AGCK2-RIPE org-name: Sophos Technology GmbH org-type: LIR address: Amalienbadstr. 41 / Bau 52 address: 76227 address: Karlsruhe address: GERMANY phone: +49721255160 fax-no: +4972125516200 e-mail: ITNetworkAdminsRIPENotifications@sophos.com admin-c: VJ1483-RIPE admin-c: BG79-RIPE admin-c: RD5731-RIPE abuse-c: AMC228-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: RL42186-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: RL42186-MNT created: 2011-07-29T13,53,12Z last-modified: 2016-07-26T12,58,58Z source: RIPE person: Bernt Gerber address: Sophos Technology GmbH address: Amalienbadstr. 41/Bau 52 address: D-76227 Karlsruhe address: DE phone: +49 721 255 160 e-mail: firstname.lastname@example.org nic-hdl: BG4140-RIPE mnt-by: RL42186-MNT created: 2013-07-18T13,54,59Z last-modified: 2013-11-28T13,24,11Z source: RIPE person: Tom Elgar address: Sophos Ltd address: The Pentagon address: Abingdon Science Park address: Abingdon OX14 3YP address: United Kingdom e-mail: email@example.com phone: +44 (0)1235 559933 nic-hdl: TE2523-RIPE mnt-by: RL42186-MNT created: 2015-09-04T12,47,59Z last-modified: 2015-09-04T12,47,59Z source: RIPE route6: 2a01,7660,,/32 descr: DE-ASTARO-20140107 descr: via TELEMAXX origin: AS12843 mnt-by: TXX-MNT mnt-by: QSC-NOC mnt-by: RL42186-MNT created: 2014-05-07T08,47,31Z last-modified: 2014-05-07T09,17,37Z 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.