General Info
Whois Details
inet6num: 2400:1000::/32 netname: KVH-JPNIC-JP-20081222 descr: Japan Network Information Center country: JP admin-c: JNIC1-AP tech-c: JNIC1-AP remarks: JPNIC Allocation Block remarks: Authoritative 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 remarks: ****************************************** remarks: For abuse/any contacts regarding this address range, remarks: please refer to the contacts listed on the inet6num remarks: object displayed down below, or look up JPNIC Whois. remarks: ****************************************** mnt-by: MAINT-JPNIC mnt-lower: MAINT-JPNIC status: ALLOCATED PORTABLE last-modified: 2009-10-29T09:24:28Z source: APNIC
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.