inetnum: 184.108.40.206 - 220.127.116.11 netname: FCC descr: Rakuten Communications Corp. descr: Rakuten Crimson House, 1-14-1 Tamagawa, descr: Setagaya-ku, Tokyo 158-0094, Japan admin-c: JNIC1-AP tech-c: JNIC1-AP remarks: Email address for spam or abuse complaints email@example.com country: JP mnt-by: MAINT-JPNIC mnt-lower: MAINT-JPNIC mnt-irt: IRT-JPNIC-JP status: ALLOCATED PORTABLE last-modified: 2016-01-21T06:14:02Z source: APNIC
IP address subranges within this IP range
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.