inet6num: 2a02,bf8,,/32 netname: UK-SPRINTLINK-20090324 country: GB org: ORG-SA70-RIPE admin-c: SIA15-RIPE tech-c: SIA15-RIPE status: ALLOCATED-BY-RIR mnt-by: RIPE-NCC-HM-MNT mnt-by: SPRINTLINK-MNT mnt-routes: SPRINTLINK-MNT notify: email@example.com created: 2009-03-24T10,51,50Z last-modified: 2017-03-03T16,08,55Z source: RIPE organisation: ORG-SA70-RIPE org-name: Sprintlink UK Ltd org-type: LIR address: 1 Fore Street, Moorgate address: EC2Y 9DT address: London address: UNITED KINGDOM phone: +17036896000 fax-no: +17036896001 mnt-ref: SPRINTLINK-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: RIPE-NCC-HM-MNT mnt-by: SPRINTLINK-MNT e-mail: firstname.lastname@example.org admin-c: YC130-RIPE abuse-c: SIA15-RIPE created: 2004-04-17T12,21,51Z last-modified: 2017-03-03T16,44,34Z source: RIPE role: Sprintlink IP Administrator address: 12000 Sunrise Valley Drive address: Reston, VA 20191 e-mail: email@example.com abuse-mailbox: firstname.lastname@example.org admin-c: YC130-RIPE admin-c: BK2405-RIPE tech-c: MA120-RIPE tech-c: KK3205-RIPE tech-c: MM25428-RIPE tech-c: AR8673-RIPE nic-hdl: SIA15-RIPE mnt-by: SPRINTLINK-MNT created: 2004-08-06T21,30,43Z last-modified: 2013-05-28T11,41,16Z source: RIPE route6: 2a02,bf8,,/32 descr: Sprint European PA space origin: AS1239 mnt-by: SPRINTLINK-MNT created: 2012-11-16T13,03,46Z last-modified: 2012-11-16T13,03,46Z 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.