inet6num: 2001,67c,218c,,/48 netname: UKRSC6-NET country: UA org: ORG-GL10-RIPE admin-c: JORA-RIPE admin-c: USZ-RIPE tech-c: JORA-RIPE tech-c: USZ-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: GNT-MNT mnt-routes: GNT-MNT mnt-domains: GNT-MNT created: 2011-03-28T13,47,48Z last-modified: 2016-04-14T09,52,26Z source: RIPE sponsoring-org: ORG-CA1603-RIPE organisation: ORG-GL10-RIPE org-name: UkrSpetsCom LLC org-type: OTHER address: Kiev, Ukraine address: P.Lumumby 4/6 admin-c: USZ-RIPE tech-c: USZ-RIPE e-mail: firstname.lastname@example.org abuse-mailbox: email@example.com abuse-c: USZ-RIPE mnt-ref: GNT-MNT mnt-by: GNT-MNT notify: firstname.lastname@example.org created: 2004-09-21T12,16,44Z last-modified: 2014-03-27T14,51,41Z source: RIPE role: UkrSpetsCom LLC NOC address: P.Lumumby 4/6, Kiev, Ukraine e-mail: email@example.com abuse-mailbox: firstname.lastname@example.org admin-c: JORA-RIPE tech-c: VZ666-RIPE tech-c: JORA-RIPE nic-hdl: USZ-RIPE mnt-by: GNT-MNT created: 2011-05-24T14,42,24Z last-modified: 2013-12-09T21,28,48Z source: RIPE person: Georgiy Belyaev address: P.Lumumby 4/6, Kiev, Ukraine phone: +380445211111 nic-hdl: JORA-RIPE e-mail: email@example.com mnt-by: GNT-MNT created: 2009-12-11T08,49,27Z last-modified: 2009-12-11T08,51,18Z source: RIPE route6: 2001,67c,218c,,/48 descr: UkrSpetsCom LLC origin: AS12986 notify: firstname.lastname@example.org mnt-by: GNT-MNT created: 2011-04-07T21,51,54Z last-modified: 2011-04-07T21,51,54Z 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.