inet6num: 2001,67c,368,,/48 netname: LBIPv6-NET descr: BANK OF LATVIA country: LV org: ORG-TBOL1-RIPE admin-c: HO679-RIPE tech-c: RF5268-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: AS12509-MNT mnt-routes: AS12509-MNT mnt-domains: AS12509-MNT notify: firstname.lastname@example.org created: 2010-11-18T13,29,30Z last-modified: 2016-04-14T08,35,36Z source: RIPE sponsoring-org: ORG-TA154-RIPE organisation: ORG-TBOL1-RIPE org-name: LATVIJAS BANKA org-type: OTHER address: 2A Valdemara street address: Riga, LV-1050 address: Latvia e-mail: email@example.com abuse-c: BOLI6-RIPE mnt-ref: AS12509-MNT mnt-by: AS12509-MNT mnt-by: LTK created: 2010-11-17T09,58,42Z last-modified: 2015-05-13T13,41,02Z source: RIPE person: Harijs Ozols address: Latvijas Banka address: K. Valdemara iela 2a address: LV-1050, Riga address: Latvia phone: +371-67022378 e-mail: firstname.lastname@example.org nic-hdl: HO679-RIPE mnt-by: AS12509-MNT created: 2008-08-30T09,42,20Z last-modified: 2015-09-10T18,40,14Z source: RIPE person: Romans Fomicevs address: 2a Valdemara street address: LV-1050 Riga address: Latvia phone: +371-67022755 fax-no: +371-67022755 e-mail: email@example.com mnt-by: LTK nic-hdl: RF5268-Ripe created: 2010-11-17T09,49,12Z last-modified: 2010-11-17T09,49,12Z source: Ripe route6: 2001,67c,368,,/48 descr: Latvijas Banka descr: Bank of Latvia origin: AS12509 mnt-by: AS12509-MNT created: 2011-02-07T15,43,42Z last-modified: 2011-02-07T15,43,42Z 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.