163.148.0.0/16
AS2907 Research Organization of Information and Systems, National Institute of Informatics
163.148.0.0/16 - JAPAN163
Whois Details
inetnum: 163.143.0.0 - 163.149.255.255 netname: JAPAN163 country: JP descr: Japan Network Information Center admin-c: JNIC1-AP tech-c: JNIC1-AP status: ALLOCATED PORTABLE notify: hostmaster@nic.ad.jp mnt-by: MAINT-JPNIC mnt-irt: IRT-JPNIC-JP mnt-lower: MAINT-JPNIC last-modified: 2015-12-01T22:25:03Z source: APNIC irt: IRT-JPNIC-JP address: Urbannet-Kanda Bldg 4F, 3-6-2 Uchi-Kanda address: Chiyoda-ku, Tokyo 101-0047, Japan e-mail: hostmaster@nic.ad.jp abuse-mailbox: hostmaster@nic.ad.jp admin-c: JNIC1-AP tech-c: JNIC1-AP auth: # Filtered mnt-by: MAINT-JPNIC last-modified: 2017-10-18T10:21:54Z source: APNIC role: Japan Network Information Center address: Urbannet-Kanda Bldg 4F address: 3-6-2 Uchi-Kanda address: Chiyoda-ku, Tokyo 101-0047,Japan country: JP phone: +81-3-5297-2311 fax-no: +81-3-5297-2312 e-mail: hostmaster@nic.ad.jp admin-c: JI13-AP tech-c: JE53-AP nic-hdl: JNIC1-AP mnt-by: MAINT-JPNIC last-modified: 2012-08-28T07:58:02Z 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.