inet6num: 2001,67c,434,,/48 netname: STADT-BONN-2 country: DE org: ORG-SB295-RIPE admin-c: SS12256-RIPE tech-c: TOPS1-RIPE status: ASSIGNED PI mnt-by: RIPE-NCC-END-MNT mnt-by: TOPS-RIPE-MNT mnt-routes: TOPS-RIPE-MNT mnt-domains: TOPS-RIPE-MNT notify: firstname.lastname@example.org created: 2014-02-13T11,32,51Z last-modified: 2016-04-14T10,13,55Z source: RIPE sponsoring-org: ORG-tA13-RIPE organisation: ORG-SB295-RIPE org-name: Stadt Bonn org-type: OTHER address: Berliner Platz 2 address: 53103 Bonn address: Germany e-mail: email@example.com abuse-c: AC29844-RIPE admin-c: SS12256-RIPE tech-c: BNTG-RIPE mnt-ref: BN-ONLINE-NOC mnt-by: BN-ONLINE-NOC created: 2009-08-19T18,45,26Z last-modified: 2016-02-15T16,44,27Z source: RIPE role: tops.net DNS Guardian address: tops.net GmbH & Co. KG address: Holtorfer Str. 35 address: D-53229 Bonn address: Germany phone: +49 228 9771 0 fax-no: +49 228 9771 199 e-mail: firstname.lastname@example.org admin-c: TOPS2-RIPE tech-c: TOPS2-RIPE nic-hdl: TOPS1-RIPE remarks: Internic, TN54-ORG notify: email@example.com mnt-by: TOPS-RIPE-MNT created: 1970-01-01T00,00,00Z last-modified: 2014-07-18T09,49,03Z source: RIPE abuse-mailbox: firstname.lastname@example.org person: Stefan Siebert address: Stadt Bonn, Amt 10-3 address: Berliner Platz 2 address: 53103 Bonn address: Germany phone: +49.228.77-3064 e-mail: email@example.com nic-hdl: SS12256-RIPE notify: firstname.lastname@example.org mnt-by: TOPS-RIPE-MNT created: 2009-08-14T14,56,14Z last-modified: 2014-07-18T09,51,27Z source: RIPE route6: 2001,67c,434,,/48 descr: Stadt Bonn IPv6 origin: as12581 mnt-by: tops-ripe-mnt created: 2015-06-12T09,59,40Z last-modified: 2015-06-12T09,59,40Z 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.