2001:67c:1820::/48 - NetpioneerV6
inet6num: 2001:67c:1820::/48 netname: NetpioneerV6 country: DE org: ORG-DPG3-RIPE admin-c: UH566-RIPE tech-c: UH566-RIPE abuse-c: AR20266-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: TXX-MNT mnt-routes: TXX-MNT mnt-domains: TXX-MNT notify: email@example.com created: 2013-10-15T05:53:12Z last-modified: 2018-07-17T12:22:50Z source: RIPE sponsoring-org: ORG-TTG2-RIPE organisation: ORG-DPG3-RIPE org-name: diva-e Platforms GmbH org-type: OTHER address: Ludwig-Erhard-Allee 20 address: D-76131 Karlsruhe e-mail: firstname.lastname@example.org phone: +49 721 92060 0 abuse-c: AR20266-RIPE mnt-ref: TXX-MNT mnt-by: TXX-MNT created: 2018-07-17T12:14:39Z last-modified: 2018-07-17T12:14:39Z source: RIPE person: Ulrich Hochholdinger address: diva-e Platforms GmbH address: Ludwig-Erhard-Allee 20 address: D-76131 Karlsruhe phone: +49 721 9206090 e-mail: Ulrich.Hochholdinger@diva-e.com nic-hdl: UH566-RIPE mnt-by: TXX-MNT created: 2010-09-13T15:45:49Z last-modified: 2018-07-18T06:40:51Z source: RIPE route6: 2001:67c:1820::/48 descr: Netpioneer GmbH origin: AS12843 mnt-by: TXX-MNT created: 2013-10-15T06:08:21Z last-modified: 2013-10-15T06:08:21Z 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.