211.81.128.0/17

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

4,113 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
211.81.153.223 AS4538 China Education and Research Network Center 15.40ms from Beijing, CN
211.81.224.43 AS4538 China Education and Research Network Center 26.09ms from Beijing, CN
211.81.221.251 AS4538 China Education and Research Network Center 31.51ms from Beijing, CN
211.81.223.165 AS4538 China Education and Research Network Center 31.89ms from Beijing, CN
211.81.249.162 AS4538 China Education and Research Network Center 7.72ms from Beijing, CN
211.81.192.32 AS4538 China Education and Research Network Center 15.62ms from Beijing, CN
211.81.214.162 AS4538 China Education and Research Network Center 25.18ms from Beijing, CN
211.81.136.198 AS4538 China Education and Research Network Center 20.53ms from Beijing, CN
211.81.139.253 AS4538 China Education and Research Network Center 20.56ms from Beijing, CN
211.81.137.42 AS4538 China Education and Research Network Center 20.51ms from Beijing, CN
211.81.176.14 AS4538 China Education and Research Network Center 16.43ms from Beijing, CN
211.81.145.6 AS4538 China Education and Research Network Center 7.67ms from Beijing, CN
211.81.225.106 AS4538 China Education and Research Network Center 26.70ms from Beijing, CN
211.81.169.252 AS4538 China Education and Research Network Center 23.39ms from Beijing, CN
211.81.130.231 AS4538 China Education and Research Network Center 20.53ms from Beijing, CN
211.81.133.233 AS4538 China Education and Research Network Center 20.51ms from Beijing, CN
211.81.170.249 AS4538 China Education and Research Network Center 22.73ms from Beijing, CN
211.81.160.251 AS4538 China Education and Research Network Center 19.73ms from Beijing, CN
211.81.228.1 AS4538 China Education and Research Network Center 29.61ms from Shijiazhuang, CN
211.81.200.6 AS4538 China Education and Research Network Center 24.66ms from Beijing, CN
211.81.141.169 AS4538 China Education and Research Network Center 20.52ms from Beijing, CN
211.81.129.132 AS4538 China Education and Research Network Center 20.52ms from Beijing, CN
211.81.195.1 AS4538 China Education and Research Network Center 15.05ms from Beijing, CN
211.81.213.5 AS4538 China Education and Research Network Center 13.62ms from Beijing, CN
211.81.240.55 AS4538 China Education and Research Network Center 7.68ms 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
85.147.104.1 AS33915 Vodafone Libertel B.V. 4.89ms from Amsterdam, NL
84.105.142.1 AS33915 Vodafone Libertel B.V. 3.40ms from Amsterdam, NL
52.207.166.97 AS14618 Amazon.com, Inc. 0.55ms from Ashburn, US
68.80.118.1 AS7922 Comcast Cable Communications, LLC 4.41ms from Ashburn, US
134.215.103.225 AS4181 TDS TELECOM 10.38ms from Atlanta, US
171.101.159.1 AS17552 True Online 2.99ms from Bangkok, TH
101.75.77.49 AS4837 CHINA UNICOM China169 Backbone 9.11ms from Beijing, CN
92.80.222.193 AS9050 Orange Romania S.A. 2.05ms from Bucharest, RO
190.247.99.1 AS7303 Telecom Argentina S.A. 1.14ms from Buenos Aires, AR
186.153.57.1 AS7303 Telecom Argentina S.A. 1.03ms from Buenos Aires, AR
186.250.29.177 AS262966 KDM INTERNET TELECOMUNICACOES LTDA 2.14ms from Cascavel, BR
122.140.32.193 AS4837 CHINA UNICOM China169 Backbone 6.83ms from Changchun, CN
70.99.119.129 AS7385 Allstream Business US, LLC 14.82ms from Chicago, US
173.90.28.1 AS10796 Charter Communications Inc 10.97ms from Columbus, US
74.63.238.97 AS46475 Limestone Networks, Inc. 0.43ms from Dallas, US
207.126.88.1 AS6939 Hurricane Electric LLC 0.25ms from Dallas, US
35.16.10.81 AS237 Merit Network Inc. 2.31ms from Flint, US
98.250.244.145 AS7922 Comcast Cable Communications, LLC 8.73ms from Flint, US
212.95.109.161 AS9145 EWE TEL GmbH 7.83ms from Frankfurt am Main, DE
190.10.146.1 AS14522 SERVICIOS DE TELECOMUNICACIONES SETEL S.A. (XTRIM EC) 1.49ms from Guayaquil, EC
116.98.250.193 AS7552 Viettel Group 0.82ms from Ho Chi Minh City, VN
103.233.158.193 AS131111 PT Mora Telematika Indonesia 1.10ms from Jakarta, ID
91.219.252.225 AS48230 LLC MONOLITH.NET 0.70ms from Kyiv, UA
82.102.67.241 AS8544 Primetel PLC 0.77ms from Limassol, CY
104.222.95.1 AS396443 Western Iowa Networks 8.22ms from Lincoln, US

Traceroute

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

$
traceroute -a -n -q1 -f3 -m18 211.81.156.78
traceroute to 211.81.156.78 (211.81.156.78): 18 hops max, 52 byte packets
3 [AS9009] 185.0.42.154 46.756 ms
4 [] 195.42.145.161 58.057 ms
5 *
6 *
7 *
8 [] 123.255.91.118 220.379 ms
9 [AS4538] 101.4.114.181 252.508 ms
10 *
11 *
12 [AS4538] 101.4.112.2 352.248 ms
13 *
14 [AS4538] 101.4.114.97 270.983 ms
15 [AS4538] 101.4.113.82 269.926 ms
16 *
17 *
18 *
Measurement taken from IPinfo ProbeNet in Istanbul, TR
On

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