inet6num: 2a02,25a8,,/29 netname: PL-HOMENET-20101008 country: PL org: ORG-hA12-RIPE admin-c: hNA8-RIPE tech-c: hNA8-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: HOMENET-MNT mnt-routes: HOMENET-MNT notify: email@example.com created: 2012-10-04T08,27,23Z last-modified: 2016-09-29T08,38,36Z source: RIPE organisation: ORG-hA12-RIPE org-name: home.pl S.A. org-type: LIR address: ul. Zbozowa 4 address: 70-653 address: Szczecin address: POLAND phone: +48914325555 phone: +48914325540 fax-no: +48914325599 mnt-ref: HOMENET-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: HOMENET-MNT e-mail: firstname.lastname@example.org admin-c: GB10591-RIPE abuse-c: HA2866-RIPE created: 2004-04-17T11,47,11Z last-modified: 2016-10-06T15,23,44Z source: RIPE role: home.pl Network Administrators address: home.pl S.A. address: Zbozowa 4 address: 70-653 Szczecin address: Poland phone: +48 504 502 500 fax-no: +48 91 432 55 99 admin-c: GB10591-RIPE tech-c: GB10591-RIPE tech-c: ZMOR4-RIPE tech-c: MAV256-RIPE nic-hdl: hNA8-RIPE mnt-by: HOMENET-MNT created: 2004-01-28T12,12,16Z last-modified: 2016-03-02T12,58,00Z source: RIPE abuse-mailbox: email@example.com e-mail: firstname.lastname@example.org route6: 2a02,25a8,,/29 descr: home.pl IPv6 network origin: AS12824 notify: email@example.com mnt-by: HOMENET-MNT created: 2012-10-06T22,47,43Z last-modified: 2012-10-06T22,47,43Z 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.