inet6num: 2a02:2248::/29 netname: BG-GCN-20100805 country: BG org: ORG-GCN3-RIPE admin-c: VIV30-RIPE tech-c: VIV30-RIPE tech-c: IDZ-RIPE status: ALLOCATED-BY-RIR notify: email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: GCN-LIR-MNT created: 2018-02-27T15:17:49Z last-modified: 2018-02-27T15:17:49Z source: RIPE organisation: ORG-GCN3-RIPE org-name: Global Communication Net Plc org-type: LIR address: Levski G, block 47, entr.2, Sofia 1836, Bulgaria address: 1202 address: SOFIA address: BULGARIA phone: +359888246331 phone: +359882960028 fax-no: +35929836826 e-mail: firstname.lastname@example.org admin-c: IDZ-RIPE admin-c: DULO1-RIPE admin-c: VIV30-RIPE admin-c: MTT67-RIPE tech-c: IDZ-RIPE tech-c: VIV30-RIPE abuse-c: GCN359-RIPE mnt-ref: RIPE-NCC-HM-MNT mnt-ref: GCN-LIR-MNT notify: email@example.com mnt-by: RIPE-NCC-HM-MNT mnt-by: GCN-LIR-MNT created: 2007-06-05T12:31:40Z last-modified: 2016-10-06T15:31:06Z source: RIPE person: Ivaylo Doychev Zakarian address: 1142 Sofia, Bulgaria address: bul. Kiril and Metodii 46 address: Global Communication Net EAD phone: +35924200888 fax-no: +35929317341 e-mail: firstname.lastname@example.org org: ORG-GCN3-RIPE nic-hdl: IDZ-RIPE mnt-by: GCN-LIR-MNT created: 2013-03-21T13:28:49Z last-modified: 2013-03-21T13:28:49Z source: RIPE person: Venko Velev address: Bulgaria, Sofia address: Slivnitza 245 bld. phone: +359882960009 phone: +35924200555 e-mail: email@example.com nic-hdl: VIV30-RIPE mnt-by: GCN-LIR-MNT created: 2013-11-08T10:00:37Z last-modified: 2013-11-08T10:00:37Z 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.