AS24348 CERNET2 IX at Tsinghua University
2400:be00::/32 - ZSPNET
inet6num: 2400:be00::/32 netname: ZSPNET descr: BEIJING ZHONGGUANCUN SOFTWARE PARK DEVELOPMENT CO.,Ltd. descr: P.O.Box 5118,Zhongguancun Software Park, descr: Haidian District, Beijing P.R.C. country: CN admin-c: EY40-AP tech-c: TZ82-AP remarks: Send abuse reports to firstname.lastname@example.org mnt-by: MAINT-CNNIC-AP mnt-irt: IRT-CNNIC-CN mnt-lower: MAINT-CNNIC-AP status: ALLOCATED PORTABLE last-modified: 2016-10-21T06:17:39Z source: APNIC person: Tony Zhang nic-hdl: TZ82-AP e-mail: email@example.com address: P.O.Box 5118,Zhongguancun Software Park,Haidian District, Beijing，P.R.C. phone: +86-010-82825690 fax-no: +86-010-82825695 country: CN mnt-by: MAINT-NEW last-modified: 2008-09-04T07:32:31Z source: APNIC person: Eric Yang nic-hdl: EY40-AP e-mail: firstname.lastname@example.org address: P.O.Box 5118,Zhongguancun Software Park,Haidian District, Beijing，P.R.C. phone: +86-010-82825690 fax-no: +86-010-82825695 country: CN mnt-by: MAINT-NEW last-modified: 2008-09-04T07:32:31Z source: APNIC irt: IRT-CNNIC-CN address: Beijing, China e-mail: email@example.com abuse-mailbox: firstname.lastname@example.org admin-c: IP50-AP tech-c: IP50-AP auth: # Filtered remarks: Please note that CNNIC is not an ISP and is not remarks: empowered to investigate complaints of network abuse. remarks: Please contact the tech-c or admin-c of the network. mnt-by: MAINT-CNNIC-AP last-modified: 2017-11-01T08:57:39Z source: APNIC
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.