Whois Details
inetnum: 123.240.0.0 - 123.241.255.255 netname: TBCOM-NET descr: TBC descr: 3F,NO.10 Ta-Yieh Road, Pei-Tou District. descr: Taipei Taiwan 112 country: TW admin-c: HN8-AP tech-c: HN8-AP status: ALLOCATED PORTABLE notify: hostmaster@twnic.net.tw mnt-by: MAINT-TW-TWNIC mnt-irt: IRT-TWNIC-AP mnt-lower: MAINT-TW-TWNIC last-modified: 2015-12-01T22:23:51Z 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.