inet6num: 2407:6380::/32 netname: SPICELINK-ID descr: PT Sano Komunikasi descr: Internet Service Provider descr: Lovina Beach descr: Bali 81152 admin-c: SH-ID tech-c: SH-ID remarks: Send Spam & Abuse Reports to email@example.com country: ID mnt-by: MNT-APJII-ID mnt-irt: IRT-SPICELINK-ID mnt-routes: MAINT-ID-SPICELINK status: ALLOCATED PORTABLE last-modified: 2016-09-27T06:53:18Z source: APNIC
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.