202.199.240.0/21
AS4538 · China Education and Research Network Center
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| Country |
China
|
| Domain | ccert.edu.cn |
| ASN | AS4538 |
| Registry | apnic |
| Hosted IPs | 2,048 |
| ID | ASIIST-CN |
WHOIS Details
inetnum: 202.199.240.0 - 202.199.247.255 netname: ASIIST-CN descr: 鞍山钢铁技术研究所 descr: Anshan Institute of Iron and Steel Technology descr: Anshan, Liaoning Province country: CN admin-c: YX282-AP tech-c: JW697-AP abuse-c: AC1685-AP status: ASSIGNED NON-PORTABLE remarks: szhu@net.edu.cn 960624 remarks: hm-changed@apnic.net 20040927 notify: address-allocation-staff@net.edu.cn mnt-by: APNIC-HM mnt-irt: IRT-CERNET-AP last-modified: 2021-03-24T13:05:17Z source: APNIC irt: IRT-CERNET-AP address: Network Research Center, address: Main Bldg, Tsinghua Univ address: Beijing 100084, China phone: +86-10-62784301 fax-no: +86-10-62785933 e-mail: abuse@cernet.edu.cn abuse-mailbox: abuse@cernet.edu.cn admin-c: CER-AP tech-c: CER-AP auth: # Filtered remarks: timezone GMT+8 remarks: http://www.ccert.edu.cn remarks: abuse@cernet.edu.cn was validated on 2025-01-22 mnt-by: MAINT-CERNET-AP last-modified: 2025-01-22T13:47:43Z source: APNIC role: ABUSE CERNETAP country: ZZ address: Network Research Center, address: Main Bldg, Tsinghua Univ address: Beijing 100084, China phone: +86-10-62784301 e-mail: abuse@cernet.edu.cn admin-c: CER-AP tech-c: CER-AP nic-hdl: AC1685-AP remarks: Generated from irt object IRT-CERNET-AP remarks: abuse@cernet.edu.cn was validated on 2025-01-22 abuse-mailbox: abuse@cernet.edu.cn mnt-by: APNIC-ABUSE last-modified: 2025-01-22T16:25:45Z source: APNIC person: Jun Wu address: Dept. of Computer Science address: Anshan Institute of Iron and Steel Technology address: 49 South Zhonghua Road, Tiedong District address: Anshan, Liaoning 114002 country: CN phone: +86 412 5532664-525 fax-no: +86 412 5564205 e-mail: linbc@email.synet.edu.cn nic-hdl: JW697-AP notify: address-allocation-staff@net.edu.cn mnt-by: MAINT-NULL last-modified: 2012-02-01T06:03:13Z source: APNIC person: Yuandan Xie address: President's Office address: Anshan Institute of Iron and Steel Technology address: 49 South Zhonghua Road, Tiedong District address: Anshan, Liaoning 114002 country: CN phone: +86 412 5532664-511 fax-no: +86 412 5564205 e-mail: linbc@email.synet.edu.cn nic-hdl: YX282-AP notify: address-allocation-staff@net.edu.cn mnt-by: MAINT-NULL last-modified: 2012-02-01T06:03:13Z source: APNIC
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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.
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