218.219.32.0/20 - JPNIC-NET-JP
Whois Details
inetnum: 218.216.0.0 - 218.231.255.255 netname: JPNIC-NET-JP descr: Japan Network Information Center country: JP admin-c: JNIC1-AP tech-c: JNIC1-AP remarks: JPNIC Allocation Block remarks: Authorative information regarding assignments and remarks: allocations made from within this block can also be remarks: queried at whois.nic.ad.jp. To obtain an English remarks: output query whois -h whois.nic.ad.jp x.x.x.x/e mnt-by: MAINT-JPNIC mnt-irt: IRT-JPNIC-JP mnt-lower: MAINT-JPNIC status: ALLOCATED PORTABLE last-modified: 2015-12-01T22:32:13Z source: APNIC
IP address subranges within this IP range
Details
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.