inet6num: 2001:b80::/29 netname: CZ-RADIOMOBIL-20030314 country: CZ org: ORG-Ra2-RIPE admin-c: TM2924-RIPE admin-c: TM2924-RIPE tech-c: TN898-RIPE notify: firstname.lastname@example.org status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: AS13036-MNT mnt-lower: AS12767-MNT mnt-lower: AS13036-MNT mnt-routes: AS12767-MNT mnt-routes: AS13036-MNT created: 2013-12-23T15:24:10Z last-modified: 2017-12-23T16:26:45Z source: RIPE organisation: ORG-Ra2-RIPE org-name: T-Mobile Czech Republic a.s. org-type: LIR address: Tomickova 2144/1 address: 149 00 address: Prague 4 address: CZECH REPUBLIC phone: +420603603431 fax-no: +420603603306 admin-c: MD6013-RIPE admin-c: TM2924-RIPE admin-c: TH4575-RIPE admin-c: IH1571-RIPE admin-c: HR6606-RIPE admin-c: ZR502-RIPE admin-c: PS15737-RIPE admin-c: AD1535-RIPE admin-c: JH5327-RIPE mnt-ref: AS13036-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: AS13036-MNT abuse-c: HR6606-RIPE created: 2004-04-17T11:04:49Z last-modified: 2017-12-23T16:26:49Z source: RIPE e-mail: email@example.com person: Tomas Mencl address: T-Mobile Czech Republic a.s. address: Tomickova 2144/1 address: Praha 4 address: 149 00 address: Czech Republic phone: +420 603 603 431 e-mail: Tomas.Mencl@t-mobile.cz nic-hdl: TM2924-RIPE created: 2006-08-21T08:40:08Z last-modified: 2013-11-21T09:51:33Z source: RIPE mnt-by: AS13036-MNT person: Tomas Nikodym address: T-Mobile Czech Republic a.s. address: Tomickova 2144/1 address: Praha 4 address: 149 00 address: Czech Republic phone: +420 603 603 412 e-mail: Tomas.Nikodym@t-mobile.cz nic-hdl: TN898-RIPE created: 2006-08-21T08:40:09Z last-modified: 2016-04-07T07:08:28Z mnt-by: RIPE-NCC-LOCKED-MNT source: RIPE route6: 2001:b80::/29 descr: AS-PRAGONET IPv6 aggregate origin: AS12767 mnt-routes: AS12767-MNT mnt-by: AS12767-MNT created: 2014-07-28T11:13:23Z last-modified: 2014-07-28T11:13:23Z 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.