inet6num: 2001,1620,2000,,/35 netname: INIT7-CUSTOMER-NET descr: Init7 Customers Aggregation country: CH org: ORG-ISA1-RIPE admin-c: ISHM-RIPE tech-c: ISIE-RIPE status: AGGREGATED-BY-LIR mnt-by: MNT-INIT7-NOC created: 2015-11-23T16,53,10Z last-modified: 2017-04-03T14,30,57Z source: RIPE assignment-size: 48 organisation: ORG-ISA1-RIPE org-name: Init7 (Switzerland) Ltd. org-type: LIR remarks: For Spam/Abuse, please contact ONLY firstname.lastname@example.org remarks: E-mails to other addresses will be IGNORED address: St. Georgen-Strasse 70 address: CH-8400 address: Winterthur address: SWITZERLAND phone: +41443154400 fax-no: +41443154401 e-mail: email@example.com admin-c: DEUT-RIPE admin-c: ISHM-RIPE admin-c: ISNO-RIPE admin-c: ISNE-RIPE admin-c: SCHN2-RIPE admin-c: FKU-RIPE admin-c: WELL-RIPE admin-c: ISIE-RIPE admin-c: LIMO-RIPE abuse-c: ISHM-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: MNT-INIT7-NOC notify: firstname.lastname@example.org mnt-by: RIPE-NCC-HM-MNT mnt-by: MNT-INIT7-NOC created: 2004-04-17T11,02,40Z last-modified: 2016-08-08T09,58,37Z source: RIPE role: Init Seven Hostmaster-Team address: Init7 (Switzerland) AG address: St. Georgen-Strasse 70 address: CH-8400 Winterthur abuse-mailbox: email@example.com phone: +41 44 315 44 00 fax-no: +41 44 315 44 01 admin-c: WELL-RIPE admin-c: LIMO-RIPE tech-c: ISNO-RIPE nic-hdl: ISHM-RIPE org: ORG-ISA1-RIPE mnt-by: MNT-INIT7-NOC created: 2003-04-29T21,01,05Z last-modified: 2013-04-17T08,36,56Z source: RIPE e-mail: firstname.lastname@example.org role: Init Seven IP Engineering address: Init7 (Switzerland) AG address: St. Georgen-Strasse 70 address: CH-8400 Winterthur abuse-mailbox: email@example.com phone: +41 44 315 44 00 fax-no: +41 44 315 44 01 admin-c: ISHM-RIPE tech-c: WELL-RIPE tech-c: LIMO-RIPE nic-hdl: ISIE-RIPE org: ORG-ISA1-RIPE mnt-by: MNT-INIT7-NOC created: 2003-04-29T21,02,11Z last-modified: 2017-03-31T15,03,36Z source: RIPE e-mail: firstname.lastname@example.org route6: 2001,1620,,/32 descr: Init Seven AG, AS13030 IPv6 Allocation origin: AS13030 mnt-by: MNT-INIT7-NOC notify: email@example.com created: 2005-10-27T22,23,08Z last-modified: 2005-10-27T22,23,08Z 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.