inet6num: 2001,7a8,,/32 netname: FR-NERIM-20020313 country: FR org: ORG-NA20-RIPE admin-c: RB7192-RIPE tech-c: RB7192-RIPE mnt-by: RIPE-NCC-HM-MNT mnt-by: NERIM-MNT mnt-routes: NERIM-MNT notify: firstname.lastname@example.org status: ALLOCATED-BY-RIR created: 2007-07-18T11,48,39Z last-modified: 2016-10-11T08,24,23Z source: RIPE organisation: ORG-NA20-RIPE org-name: Nerim SAS org-type: LIR address: 96 boulevard Haussmann address: 75008 address: Paris address: FRANCE phone: +33973870000 fax-no: +33973870095 e-mail: email@example.com abuse-c: AR15313-RIPE admin-c: AV-RIPE admin-c: GPST-RIPE mnt-ref: NERIM-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: NERIM-MNT created: 2004-04-17T11,22,57Z last-modified: 2016-10-11T08,25,00Z source: RIPE person: Raphael Bouaziz address: Nerim address: 15 rue d'Aboukir address: 75002 Paris address: France phone: +33 1 44 82 07 17 fax-no: +33 1 44 82 07 16 e-mail: firstname.lastname@example.org nic-hdl: RB7192-RIPE mnt-by: MNT-TISCALIFR-B2B created: 1970-01-01T00,00,00Z last-modified: 2004-09-15T11,45,44Z source: RIPE route6: 2001,7a8,,/32 descr: NERIM-2001-7A8 origin: AS13193 mnt-by: NERIM-MNT created: 2007-04-06T12,30,51Z last-modified: 2007-04-06T12,30,51Z 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.