inet6num: 2001:4170::/32 netname: RS-RCUB-20041012 country: RS org: ORG-UUB1-RIPE admin-c: BJ1486-RIPE tech-c: PV3056-RIPE tech-c: BJ1486-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: AMRES-MNT mnt-lower: UB-MNT mnt-lower: AMRES-MNT mnt-routes: UB-MNT mnt-routes: AMRES-MNT notify: email@example.com created: 2004-10-12T10:03:37Z last-modified: 2018-01-17T09:31:29Z source: RIPE organisation: ORG-UUB1-RIPE org-name: Akademska mreza Republike Srbije - AMRES org-type: LIR address: Bulevar Kralja Aleksandra 90 address: 11000 address: Belgrade address: SERBIA phone: +381117158942 phone: +381113031257 fax-no: +381113370288 fax-no: +381113031259 e-mail: firstname.lastname@example.org admin-c: PV3056-RIPE admin-c: BJ1486-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: AMRES-MNT mnt-ref: UB-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: AMRES-MNT abuse-c: ASD46-RIPE created: 2004-09-29T09:41:09Z last-modified: 2016-12-08T10:48:33Z source: RIPE person: Bojan Jakovljevic address: Academic Network of Serbia (AMRES) address: Bulevar Kralja Aleksandra 90 address: 11000 Beograd address: Serbia phone: +381113031258 nic-hdl: BJ1486-RIPE mnt-by: AMRES-MNT created: 2010-10-26T14:11:44Z last-modified: 2017-10-30T22:11:24Z source: RIPE person: Pavle Vuletic address: Academic Network of Serbia (AMRES) address: Bulevar Kralja Aleksandra 90 address: 11000 Beograd address: Serbia phone: +381 11 3031258 fax-no: +381 11 3031259 nic-hdl: PV3056-RIPE mnt-by: AMRES-MNT created: 1970-01-01T00:00:00Z last-modified: 2017-10-30T21:45:19Z source: RIPE route6: 2001:4170::/32 descr: Academic Network of Serbia (AMRES) origin: AS13092 mnt-by: AMRES-MNT created: 2006-10-24T10:00:30Z last-modified: 2012-01-27T16:21:23Z 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.