211.81.40.0/22

AS4538  ·  China Education and Research Network Center

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Summary

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

Nearby Ranges

BGP prefixes that overlap with 211.81.0.0/16

No nearby ranges found.

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity

Pingable IPs

14 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
211.81.41.33 AS4538 China Education and Research Network Center 5.98ms from Beijing, CN
211.81.43.31 AS4538 China Education and Research Network Center 5.71ms from Beijing, CN
211.81.40.170 AS4538 China Education and Research Network Center 5.71ms from Beijing, CN
211.81.42.80 AS4538 China Education and Research Network Center 5.75ms 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
114.31.144.150 AS38266 Vodafone Idea Ltd 7.61ms from Ahmedabad, IN
41.36.23.214 AS8452 TE-AS 7.02ms from Cairo, EG
65.71.231.22 AS7018 AT&T Enterprises, LLC 2.59ms from Dallas, US
104.48.136.246 AS7018 AT&T Enterprises, LLC 3.82ms from Dallas, US
12.252.232.198 AS7018 AT&T Enterprises, LLC 4.97ms from Durham, US
43.100.28.198 AS45102 Alibaba (US) Technology Co., Ltd. 0.64ms from Hong Kong, HK
35.242.152.70 AS396982 Google LLC 0.10ms from London, GB
82.36.0.246 AS5089 Virgin Media Limited 2.31ms from London, GB
4.158.69.38 AS8075 Microsoft Corporation 0.20ms from London, GB
194.207.138.70 AS12390 KCOM Group Limited 3.23ms from Manchester, GB
51.155.20.38 AS13037 Zen Internet Ltd 0.98ms from Manchester, GB
58.178.106.182 AS9443 Vocus Retail 1.55ms from Melbourne, AU
87.15.196.246 AS3269 Telecom Italia S.p.A. 6.24ms from Milan, IT
95.79.149.246 AS42682 JSC ER-Telecom Holding 6.80ms from Moscow, RU
60.181.63.150 AS4134 CHINANET-BACKBONE 8.08ms from Ningbo, CN
73.131.75.70 AS7922 Comcast Cable Communications, LLC 17.57ms from Orlando, US
112.248.0.134 AS4837 CHINA UNICOM China169 Backbone 7.61ms from Qingdao, CN
195.189.30.150 AS35104 Jusan Mobile JSC 0.74ms from Almaty, KZ
24.41.43.86 AS7029 Windstream Communications LLC 0.46ms from Atlanta, US
96.73.212.118 AS7922 Comcast Cable Communications, LLC 4.53ms from Atlanta, US
121.18.33.22 AS4837 CHINA UNICOM China169 Backbone 9.52ms from Beijing, CN
196.31.59.198 AS16637 MTN SA 1.55ms from Johannesburg, ZA
141.51.122.230 AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. 0.63ms from Kassel, DE
156.252.158.38 AS398823 PEG TECH INC 0.33ms from Los Angeles, US
86.51.188.214 AS35819 Etihad Etisalat, a joint stock company 2.92ms from Manama, BH

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$
traceroute -a -n -q1 -f2 211.81.43.253
traceroute to 211.81.43.253 (211.81.43.253): 64 hops max, 52 byte packets
2 [AS749] 11.73.44.185 0.644 ms
3 [AS749] 11.73.16.73 0.86 ms
4 *
5 *
6 *
7 *
8 *
9 [AS4538] 101.4.130.65 5.667 ms
10 [AS4538] 219.224.103.66 4.931 ms
11 [AS4538] 101.4.112.70 19.003 ms
12 *
13 [AS4538] 202.127.216.97 8.397 ms
14 *
15 [AS4538] 59.67.181.14 8.365 ms
17 [AS4538] 211.81.43.253 6.933 ms
Measurement taken from IPinfo ProbeNet in Beijing, CN
On

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