inet6num: 2001,67c,12d8,,/48 descr: In use by public IRC server for the Eris Free Network netname: NL-DARKNESS-REIGNS-EFNET country: NL org: ORG-DRB2-RIPE admin-c: TPK-RIPE tech-c: TPK-RIPE tech-c: WB311-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: DARKNESS-REIGNS-MNT mnt-domains: DARKNESS-REIGNS-MNT mnt-routes: DARKNESS-REIGNS-MNT mnt-routes: AS1101-MNT created: 2015-07-13T12,15,34Z last-modified: 2016-07-22T08,39,51Z source: RIPE organisation: ORG-DRB2-RIPE org-name: Darkness Reigns (Holding) B.V. org-type: LIR remarks: * remarks: * ^-^-^-@@-^-^-^ don't fail remarks: * (..)-----; to mail remarks: * ||---|| firstname.lastname@example.org remarks: * ^^ ^^ it angers the abuse moose remarks: * address: PO Box 1050 address: 1200BB address: Hilversum address: NETHERLANDS phone: +31881415926 fax-no: +31881415927 e-mail: email@example.com admin-c: TPK-RIPE abuse-c: ABDR-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: DARKNESS-REIGNS-MNT abuse-mailbox: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: DARKNESS-REIGNS-MNT created: 2013-01-25T09,36,53Z last-modified: 2016-07-21T20,14,46Z source: RIPE person: T.P. Koeman org: ORG-DRB2-RIPE address: PO Box 1050 address: 1200BB address: Hilversum address: NETHERLANDS phone: +31881415926 fax-no: +31881415927 remarks: * remarks: * ^-^-^-@@-^-^-^ don't fail remarks: * (..)-----; to mail remarks: * ||---|| email@example.com remarks: * ^^ ^^ it angers the abuse moose remarks: * e-mail: firstname.lastname@example.org notify: email@example.com nic-hdl: TPK-RIPE mnt-by: DARKNESS-REIGNS-MNT created: 2011-06-09T17,45,51Z last-modified: 2015-11-27T18,14,30Z source: RIPE person: Wim Biemolt address: SURFnet bv address: P.O. Box 19035 address: NL - 3501 DA Utrecht address: The Netherlands phone: +31 88 7873000 e-mail: Wim.Biemolt@surfnet.nl nic-hdl: WB311-RIPE remarks: http,//www.biemolt.com/ notify: Wim.Biemolt@surfnet.nl mnt-by: SN-LIR-MNT created: 1970-01-01T00,00,00Z last-modified: 2015-01-07T21,14,52Z source: RIPE route6: 2001,67c,12d8,,/48 descr: In use by public IRC server for the Eris Free Network origin: AS1101 mnt-by: AS1101-MNT created: 2016-09-15T20,47,41Z last-modified: 2016-09-15T20,47,41Z 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.