inet6num: 2a00,17c0,,/32 netname: LV-DEAC-20091202 country: LV org: ORG-DEAC1-RIPE admin-c: DH766-RIPE tech-c: DH766-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: DEAC-MNT mnt-routes: DEAC-MNT notify: firstname.lastname@example.org created: 2009-12-02T12,40,00Z last-modified: 2016-11-02T12,54,44Z source: RIPE organisation: ORG-DEAC1-RIPE org-name: SIA Digitalas Ekonomikas Attistibas Centrs org-type: LIR address: Maskavas street 459 address: LV-1063 address: Riga address: LATVIA phone: +371 67072100 fax-no: +371 67072199 e-mail: email@example.com admin-c: DH766-RIPE admin-c: ZV128-RIPE admin-c: KG16831-RIPE admin-c: AG6663-RIPE admin-c: AS32768-RIPE admin-c: EL284-RIPE mnt-ref: DEAC-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: DEAC-MNT abuse-mailbox: firstname.lastname@example.org abuse-c: DA12993 created: 2004-04-17T11,38,03Z last-modified: 2016-11-02T12,55,03Z source: RIPE role: DEAC HostMaster address: Digitalas Ekonomikas Attistibas Centrs address: 459 Maskavas street address: LV-1063, Riga, Latvia phone: +371 67072100 fax-no: +371 67072199 remarks: trouble, Information, http,//www.deac.eu/ remarks: trouble, Questions -- mailto,email@example.com remarks: trouble, Abuse reports -- mailto,firstname.lastname@example.org abuse-mailbox: email@example.com admin-c: AG6663-RIPE tech-c: AG6663-RIPE tech-c: EL284-RIPE tech-c: ZV128-RIPE tech-c: AS32768-RIPE tech-c: KG16831-RIPE nic-hdl: DH766-RIPE mnt-by: DEAC-MNT created: 2002-07-02T09,53,04Z last-modified: 2015-01-12T11,48,40Z source: RIPE e-mail: firstname.lastname@example.org route6: 2a00,17c0,,/32 descr: Digitalas Ekonomikas Attistibas Centrs origin: AS12993 mnt-by: DEAC-MNT created: 2011-05-31T13,18,16Z last-modified: 2011-05-31T13,18,16Z 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.