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
211.81.228.1 AS4538 China Education and Research Network Center 29.61ms from Shijiazhuang, CN
211.81.208.71 AS4538 China Education and Research Network Center 31.64ms from Beijing, CN
211.81.221.251 AS4538 China Education and Research Network Center 31.51ms from Beijing, CN
211.81.225.106 AS4538 China Education and Research Network Center 26.70ms from Beijing, CN
211.81.223.165 AS4538 China Education and Research Network Center 31.89ms from Beijing, CN
211.81.238.1 AS4538 China Education and Research Network Center 26.34ms from Tianjin, CN
211.81.214.162 AS4538 China Education and Research Network Center 25.18ms from Beijing, CN
211.81.224.43 AS4538 China Education and Research Network Center 26.09ms 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
211.81.249.162 AS4538 China Education and Research Network Center 7.72ms from Beijing, CN
211.81.131.91 AS4538 China Education and Research Network Center 20.51ms from Beijing, CN
211.81.169.252 AS4538 China Education and Research Network Center 23.39ms from Beijing, CN
211.81.160.251 AS4538 China Education and Research Network Center 19.73ms from Beijing, CN
211.81.176.14 AS4538 China Education and Research Network Center 16.43ms from Beijing, CN
211.81.170.249 AS4538 China Education and Research Network Center 22.73ms from Beijing, CN
211.81.129.132 AS4538 China Education and Research Network Center 20.52ms from Beijing, CN
211.81.141.169 AS4538 China Education and Research Network Center 20.52ms from Beijing, CN
211.81.156.129 AS4538 China Education and Research Network Center 16.64ms from Beijing, CN
211.81.136.198 AS4538 China Education and Research Network Center 20.53ms from Beijing, CN
211.81.130.231 AS4538 China Education and Research Network Center 20.53ms from Beijing, CN
211.81.192.32 AS4538 China Education and Research Network Center 15.62ms from Beijing, CN
211.81.157.9 AS4538 China Education and Research Network Center 15.71ms from Beijing, CN
211.81.134.130 AS4538 China Education and Research Network Center 20.57ms from Beijing, CN
211.81.206.74 AS4538 China Education and Research Network Center 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 AS201309 Morteza Imani Bidgoli 0.16ms from Amsterdam, NL
92.108.86.1 AS33915 Vodafone Libertel B.V. 1.27ms from Amsterdam, NL
37.44.12.129 AS61060 NXTcom Nederland BV 1.08ms from Amsterdam, NL
54.172.163.193 AS14618 Amazon.com, Inc. 0.51ms from Ashburn, US
207.87.32.241 AS2828 Verizon Business 1.88ms from Ashburn, US
71.252.103.1 AS701 Verizon Business 1.68ms from Ashburn, US
65.199.51.17 AS701 Verizon Business 2.09ms from Ashburn, US
67.48.96.1 AS11955 Charter Communications Inc 6.84ms from Atlanta, US
212.230.159.1 AS15704 XTRA TELECOM S.A. 0.25ms from Barcelona, ES
190.93.148.1 AS19429 ETB - Colombia 1.15ms from Bogota, CO
38.162.206.1 AS397545 Purple Cow Internet Inc 14.96ms from Boston, US
50.232.229.1 AS7922 Comcast Cable Communications, LLC 1.39ms from Boston, US
109.89.213.1 AS12392 VOO S.A. 2.32ms from Brussels, BE
91.146.151.209 AS8462 Tarr Kft. 10.22ms from Budapest, HU
181.46.129.1 AS27747 Telecentro S.A. 0.68ms from Buenos Aires, AR
190.120.111.1 AS28100 COOPERATIVA DE SERVICIOS PUBLICOS Y SOCIALES VILLA DEL ROSARIO LTDA 8.63ms from Buenos Aires, AR
41.44.56.1 AS8452 TE-AS 1.60ms from Cairo, EG
102.209.120.1 AS328474 Jebo Connect Pty Ltd 4.30ms from Cape Town, ZA
197.79.58.33 AS37611 AFRIHOST SP (PTY) LTD 16.81ms from Cape Town, ZA
67.219.70.1 AS11492 CABLE ONE, INC. 11.24ms from Chicago, US
189.16.200.177 AS4230 CLARO S.A. 2.45ms from Curitiba, BR
123.187.121.1 AS4134 CHINANET-BACKBONE 4.40ms from Dalian, CN
103.24.69.1 AS150384 Progresive Enterprise 1.57ms from Dhaka, BD
176.202.60.129 AS8781 Ooredoo Q.S.C. 0.23ms from Doha, QA
217.255.141.129 AS3320 Deutsche Telekom AG 6.21ms from Duesseldorf, DE

Traceroute

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

$
traceroute -a -n -q1 -f2 -m17 211.81.188.145
traceroute to 211.81.188.145 (211.81.188.145): 17 hops max, 52 byte packets
3 *
4 [AS6939] 184.104.198.73 93.623 ms
5 *
6 *
7 [] 123.255.91.118 204.547 ms
8 [AS4538] 101.4.114.181 238.25 ms
9 *
10 [AS4538] 101.4.117.81 237.464 ms
11 [AS4538] 101.4.112.2 250.235 ms
12 *
13 [AS4538] 101.4.114.97 254.605 ms
14 [AS4538] 101.4.113.82 255.13 ms
15 *
16 *
17 *
Measurement taken from IPinfo ProbeNet in Hudiksvall, SE
On

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