211.81.40.0/24

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

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

IP Address ASN Details
211.81.40.121 AS4538 China Education and Research Network Center 5.76ms 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
104.182.207.248 AS7018 AT&T Enterprises, LLC 1.21ms from Atlanta, US
201.176.220.184 AS22927 Telefonica de Argentina 1.82ms from Buenos Aires, AR
192.77.115.72 AS216134 ZF Friedrichshafen AG 5.80ms from Frankfurt am Main, DE
1.238.181.136 AS9318 SK Broadband Co Ltd 1.74ms from Incheon, KR
81.158.203.104 AS2856 British Telecommunications PLC 10.86ms from London, GB
216.87.238.40 AS4181 TDS TELECOM 13.15ms from Seattle, US
186.210.103.152 AS53006 ALGAR TELECOM S/A 5.71ms from Uberlandia, BR
79.185.222.200 AS5617 Orange Polska Spolka Akcyjna 19.23ms from Warsaw, PL
101.75.106.104 AS4837 CHINA UNICOM China169 Backbone 12.77ms from Beijing, CN
97.118.70.136 AS209 CenturyLink Communications, LLC 8.34ms from Denver, US
91.53.4.168 AS3320 Deutsche Telekom AG 3.36ms from Frankfurt am Main, DE
79.220.90.232 AS3320 Deutsche Telekom AG 2.32ms from Frankfurt am Main, DE
178.254.2.152 AS42730 EVANZO e-commerce GmbH 0.35ms from Frankfurt am Main, DE
1.55.115.120 AS18403 FPT Telecom Company 3.84ms from Ho Chi Minh City, VN
14.183.66.248 AS45899 VNPT Corp 6.31ms from Ho Chi Minh City, VN
157.245.125.24 AS14061 DigitalOcean, LLC 0.33ms from New York City, US
54.162.213.232 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
75.132.153.136 AS20115 Charter Communications LLC 6.40ms from St. Louis, US
34.76.20.56 AS396982 Google LLC 0.15ms from Brussels, BE
186.57.130.248 AS22927 Telefonica de Argentina 1.99ms from Buenos Aires, AR
187.147.148.184 AS8151 UNINET 12.25ms from Cancún, MX
82.9.77.8 AS5089 Virgin Media Limited 9.66ms from Dublin, IE
128.171.159.248 AS6360 University of Hawaii 3.43ms from Honolulu, US
182.214.90.200 AS17858 LG POWERCOMM 1.73ms from Incheon, KR
14.80.28.184 AS4766 Korea Telecom 6.00ms from Incheon, KR

Traceroute

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

$
traceroute -a -n -q1 -f8 211.81.40.172
traceroute to 211.81.40.172 (211.81.40.172): 64 hops max, 52 byte packets
8 [AS4538] 101.4.130.61 5.417 ms
9 *
10 [AS4538] 101.4.112.70 7.176 ms
11 *
12 *
13 *
14 *
15 [AS4538] 59.67.181.85 6.851 ms
16 *
17 [AS4538] 211.81.43.254 7.634 ms
18 *
19 [AS4538] 211.81.40.172 6.604 ms
Measurement taken from IPinfo ProbeNet in Beijing, CN
On

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