211.81.128.0/17
AS4538 · China Education and Research Network Center
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| Country |
China
|
| Domain | cernet.edu.cn |
| ASN | AS4538 |
| Registry | APNIC |
| ID | CERNET-CN |
WHOIS Details
inetnum: 211.81.0.0 - 211.82.255.255 netname: CERNET-CN descr: China Education and Research Network descr: Beijing Regional Network country: CN admin-c: JW1-CN tech-c: XL1-CN tech-c: SZ2-AP abuse-c: AC1685-AP status: ALLOCATED PORTABLE mnt-by: APNIC-HM mnt-lower: MAINT-CERNET-AP mnt-routes: MAINT-CERNET-AP mnt-irt: IRT-CERNET-AP last-modified: 2020-10-20T00:56:14Z source: APNIC irt: IRT-CERNET-AP address: Network Center, address: FIT-3-220, 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: abuse@cernet.edu.cn was validated on 2026-03-05 mnt-by: MAINT-CERNET-AP last-modified: 2026-03-05T06:39:56Z source: APNIC role: ABUSE CERNETAP country: ZZ address: Network Center, address: FIT-3-220, 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 2026-03-05 abuse-mailbox: abuse@cernet.edu.cn mnt-by: APNIC-ABUSE last-modified: 2026-03-05T06:40:20Z source: APNIC person: Jianping Wu address: China Education and Research Network Center address: Room 225, Main Building, Tsinghua University address: Beijing 100084 address: CN country: CN phone: +86-10-6278-5983 fax-no: +86-10-6278-5933 e-mail: jianping@cernet.edu.cn nic-hdl: JW1-CN mnt-by: MAINT-CERNET-AP last-modified: 2011-12-22T05:14:25Z source: APNIC person: Shuang Zhu address: China Education and Research Network Information Center address: Room 225, Main Building, Tsinghua University address: Beijing 100084, China country: CN phone: +86-10-6278-5931 fax-no: +86-10-6278-5933 e-mail: szhu@cernet.edu.cn nic-hdl: SZ2-AP mnt-by: MAINT-CERNET-AP last-modified: 2011-12-22T05:14:36Z source: APNIC person: Xing Li address: China Education and Research Network Center address: Room 225, Main Building, Tsinghua University address: Beijing 100084 address: CN country: CN phone: +86-10-6278-5983 fax-no: +86-10-6278-5933 e-mail: xing@cernet.edu.cn nic-hdl: XL1-CN mnt-by: MAINT-CERNET-AP last-modified: 2011-12-22T05:14:25Z source: APNIC
Hosted domains
There are no domains currently hosted on this ASN.
Hosted domains API
Pingable IPs
4,113 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 211.81.228.1 |
29.61ms from Shijiazhuang,
CN
|
|
| 211.81.208.71 |
31.64ms from Beijing,
CN
|
|
| 211.81.221.251 |
31.51ms from Beijing,
CN
|
|
| 211.81.225.106 |
26.70ms from Beijing,
CN
|
|
| 211.81.223.165 |
31.89ms from Beijing,
CN
|
|
| 211.81.238.1 |
26.34ms from Tianjin,
CN
|
|
| 211.81.214.162 |
25.18ms from Beijing,
CN
|
|
| 211.81.224.43 |
26.09ms from Beijing,
CN
|
|
| 211.81.213.5 |
13.62ms from Beijing,
CN
|
|
| 211.81.240.55 |
7.68ms from Beijing,
CN
|
|
| 211.81.249.162 |
7.72ms from Beijing,
CN
|
|
| 211.81.131.91 |
20.51ms from Beijing,
CN
|
|
| 211.81.169.252 |
23.39ms from Beijing,
CN
|
|
| 211.81.160.251 |
19.73ms from Beijing,
CN
|
|
| 211.81.176.14 |
16.43ms from Beijing,
CN
|
|
| 211.81.170.249 |
22.73ms from Beijing,
CN
|
|
| 211.81.129.132 |
20.52ms from Beijing,
CN
|
|
| 211.81.141.169 |
20.52ms from Beijing,
CN
|
|
| 211.81.156.129 |
16.64ms from Beijing,
CN
|
|
| 211.81.136.198 |
20.53ms from Beijing,
CN
|
|
| 211.81.130.231 |
20.53ms from Beijing,
CN
|
|
| 211.81.192.32 |
15.62ms from Beijing,
CN
|
|
| 211.81.157.9 |
15.71ms from Beijing,
CN
|
|
| 211.81.134.130 |
20.57ms from Beijing,
CN
|
|
| 211.81.206.74 |
25.33ms from Beijing,
CN
|
Other Pingable IPs
Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.
| IP Address | ASN | Details |
|---|---|---|
| 87.248.129.33 |
0.16ms from Amsterdam,
NL
|
|
| 92.108.86.1 |
1.27ms from Amsterdam,
NL
|
|
| 37.44.12.129 |
1.08ms from Amsterdam,
NL
|
|
| 54.172.163.193 |
0.51ms from Ashburn,
US
|
|
| 207.87.32.241 |
1.88ms from Ashburn,
US
|
|
| 71.252.103.1 |
1.68ms from Ashburn,
US
|
|
| 65.199.51.17 |
2.09ms from Ashburn,
US
|
|
| 67.48.96.1 |
6.84ms from Atlanta,
US
|
|
| 212.230.159.1 |
0.25ms from Barcelona,
ES
|
|
| 190.93.148.1 |
1.15ms from Bogota,
CO
|
|
| 38.162.206.1 |
14.96ms from Boston,
US
|
|
| 50.232.229.1 |
1.39ms from Boston,
US
|
|
| 109.89.213.1 |
2.32ms from Brussels,
BE
|
|
| 91.146.151.209 |
10.22ms from Budapest,
HU
|
|
| 181.46.129.1 |
0.68ms from Buenos Aires,
AR
|
|
| 190.120.111.1 |
8.63ms from Buenos Aires,
AR
|
|
| 41.44.56.1 |
1.60ms from Cairo,
EG
|
|
| 102.209.120.1 |
4.30ms from Cape Town,
ZA
|
|
| 197.79.58.33 |
16.81ms from Cape Town,
ZA
|
|
| 67.219.70.1 |
11.24ms from Chicago,
US
|
|
| 189.16.200.177 |
2.45ms from Curitiba,
BR
|
|
| 123.187.121.1 |
4.40ms from Dalian,
CN
|
|
| 103.24.69.1 |
1.57ms from Dhaka,
BD
|
|
| 176.202.60.129 |
0.23ms from Doha,
QA
|
|
| 217.255.141.129 |
6.21ms from Duesseldorf,
DE
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
What are IP address ranges?
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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