inet6num: 2a02,2148,,/29 netname: GR-FORTHNET-20100715 country: GR org: ORG-FS5-RIPE admin-c: FARO1-RIPE tech-c: FTO1-RIPE status: ALLOCATED-BY-RIR notify: email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: FORTHNETGR-MNT created: 2012-07-19T13,50,36Z last-modified: 2016-10-10T15,01,54Z source: RIPE organisation: ORG-FS5-RIPE org-name: FORTHnet SA org-type: LIR address: address: 176 71 address: Athens address: GREECE phone: +302119557000 fax-no: +302119557111 e-mail: firstname.lastname@example.org admin-c: VB3058-RIPE admin-c: KG290-RIPE admin-c: CK4191-RIPE admin-c: FTO1-RIPE abuse-c: FARO1-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: FORTHNETGR-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: FORTHNETGR-MNT created: 2004-04-17T11,24,53Z last-modified: 2016-11-01T08,02,47Z source: RIPE role: Forthnet Administrative Role address: 58, Antigonis Str address: 104 42, ATHENS address: GR phone: +30 2119557000 fax-no: +30 2119557222 e-mail: email@example.com abuse-mailbox: firstname.lastname@example.org admin-c: CK4191-RIPE tech-c: FTO1-RIPE nic-hdl: FARO1-RIPE mnt-by: FORTHNETGR-MNT created: 2011-05-03T09,51,08Z last-modified: 2013-12-20T09,45,56Z source: RIPE role: Forthnet Technical Operations address: 58, Antigonis Str address: 104 42, ATHENS address: GR e-mail: email@example.com phone: +30 2119557000 fax-no: +30 2119557222 admin-c: FARO1-RIPE tech-c: DK637-RIPE tech-c: KG290-RIPE tech-c: VB3058-RIPE nic-hdl: FTO1-RIPE mnt-by: FORTHNETGR-MNT notify: firstname.lastname@example.org created: 1970-01-01T00,00,00Z last-modified: 2016-11-01T07,58,58Z source: RIPE abuse-mailbox: email@example.com route6: 2a02,2148,,/29 descr: Forthnet IPv6 Route Object origin: AS1241 mnt-by: FORTHNETGR-MNT created: 2012-08-01T09,25,02Z last-modified: 2012-08-01T09,25,02Z 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.