inet6num: 2a06,9040,,/29 netname: DE-STADTNETZE-20150918 country: DE org: ORG-SBG7-RIPE admin-c: OJ777-RIPE tech-c: OJ777-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: de-stadtnetze-1-mnt mnt-lower: TNG-MNT mnt-lower: de-stadtnetze-1-mnt mnt-routes: de-stadtnetze-1-mnt mnt-routes: TNG-MNT created: 2015-09-18T08,22,25Z mnt-domains: de-stadtnetze-1-mnt mnt-domains: TNG-MNT last-modified: 2017-01-11T12,10,18Z source: RIPE organisation: ORG-SBG7-RIPE org-name: Stadtnetze Barmstedt GmbH org-type: LIR address: Bahnhofstr. 27 address: 25355 address: Barmstedt address: GERMANY e-mail: email@example.com admin-c: OJ777-RIPE tech-c: OJ777-RIPE abuse-c: AR33354-RIPE mnt-ref: de-stadtnetze-1-mnt mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: de-stadtnetze-1-mnt created: 2015-08-31T12,31,31Z last-modified: 2017-01-11T12,10,26Z source: RIPE phone: +494123681960 fax-no: +494123681961 person: Oliver Jarmes address: Bahnhofstr. 27 address: 25355 address: Barmstedt address: GERMANY phone: +494123681872 nic-hdl: OJ777-RIPE mnt-by: de-stadtnetze-1-mnt created: 2015-08-31T12,31,30Z last-modified: 2015-08-31T12,31,31Z source: RIPE route6: 2a06,9040,,/29 descr: Stadtnetze Barmstedt GmbH origin: AS13101 mnt-by: TNG-MNT created: 2015-09-18T08,32,19Z last-modified: 2015-09-18T08,32,19Z 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.