166.111.0.0/17

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain tsinghua.edu.cn
ASN AS4538
Parent Range 166.111.0.0/16
Registry APNIC
ID TSINGHUA-CN

WHOIS Details

inetnum:        166.111.0.0 - 166.111.255.255
netname:        TSINGHUA-CN
descr:          Tsinghua University
country:        CN
org:            ORG-CEAR1-AP
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
mnt-by:         APNIC-HM
mnt-lower:      MAINT-TSINGHUA-CERNET
mnt-routes:     MAINT-TSINGHUA-CERNET
mnt-irt:        IRT-CERNET-AP
last-modified:  2023-09-06T06:09:18Z
source:         APNIC

irt:            IRT-CERNET-AP
address:        Network Research Center,
address:        Main Bldg, 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:        http://www.ccert.edu.cn
remarks:        abuse@cernet.edu.cn was validated on 2025-08-15
mnt-by:         MAINT-CERNET-AP
last-modified:  2025-09-04T00:59:41Z
source:         APNIC

organisation:   ORG-CEAR1-AP
org-name:       China Education and Research Network (CERNET)
country:        CN
address:        FIT 3-220,
address:        Tsinghua University
phone:          +86-10-62785983
fax-no:         +86-10-62785933
e-mail:         hostmaster@cernic.net
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2018-09-13T12:56:34Z
source:         APNIC

role:           ABUSE CERNETAP
country:        ZZ
address:        Network Research Center,
address:        Main Bldg, 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 2025-08-15
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-08-15T09:38:28Z
source:         APNIC

role:           CERNET Helpdesk
address:        CERNET Center
address:        Beijing 100084, China
country:        CN
phone:          +86-10-6278-4049
fax-no:         +86-10-6278-5933
e-mail:         helpdesk@cernet.edu.cn
remarks:        abuse@cernet.edu.cn
admin-c:        XL1-CN
tech-c:         SZ2-AP
nic-hdl:        CER-AP
mnt-by:         MAINT-CERNET-AP
last-modified:  2020-09-03T09:14:12Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 166.111.0.0/17

Range ASN Company Num of IPs
166.111.0.0/16 AS4538 Tsinghua University 65,536

Nearby Ranges

BGP prefixes that overlap with 166.111.0.0/16

Range ASN Company Num of IPs
166.111.0.0/16 AS4538 Tsinghua University 65,536

Hosted domains

There are 55 domain names hosted across 41 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
166.111.89.112 sunist.site 2
166.111.77.32 tedhub.cn 2
166.111.94.214 tianmouc.com 1
166.111.38.97 jincai.info 1
166.111.32.225 zsxgroup.asia 1
166.111.33.148 love0821.top 1
166.111.124.168 qhfz.cn 1
166.111.61.133 gdp-lab.top 1
166.111.98.101 liujingming.com 1
166.111.17.82 interact.cool 1
166.111.5.215 mbacn.edu.cn 1

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

1,851 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
166.111.2.1 AS4538 China Education and Research Network Center 2.24ms from Beijing, CN
166.111.95.52 AS4538 China Education and Research Network Center 2.64ms from Beijing, CN
166.111.52.200 AS4538 China Education and Research Network Center 2.18ms from Beijing, CN
166.111.53.77 AS4538 China Education and Research Network Center 2.20ms from Beijing, CN
166.111.124.1 AS4538 China Education and Research Network Center 3.60ms from Beijing, CN
166.111.19.33 AS4538 China Education and Research Network Center 2.48ms from Beijing, CN
166.111.88.33 AS4538 China Education and Research Network Center 2.49ms from Beijing, CN
166.111.7.71 AS4538 China Education and Research Network Center 2.27ms from Beijing, CN
166.111.35.134 AS4538 China Education and Research Network Center 2.22ms from Beijing, CN
166.111.114.1 AS4538 China Education and Research Network Center 2.44ms from Beijing, CN
166.111.60.1 AS4538 China Education and Research Network Center 2.32ms from Beijing, CN
166.111.6.165 AS4538 China Education and Research Network Center 2.82ms from Beijing, CN
166.111.63.60 AS4538 China Education and Research Network Center 2.10ms from Beijing, CN
166.111.40.129 AS4538 China Education and Research Network Center 2.39ms from Beijing, CN
166.111.94.191 AS4538 China Education and Research Network Center 2.25ms from Beijing, CN
166.111.110.184 AS4538 China Education and Research Network Center 2.26ms from Beijing, CN
166.111.57.1 AS4538 China Education and Research Network Center 2.28ms from Beijing, CN
166.111.106.1 AS4538 China Education and Research Network Center 2.57ms from Beijing, CN
166.111.50.77 AS4538 China Education and Research Network Center 2.13ms from Beijing, CN
166.111.56.1 AS4538 China Education and Research Network Center 4.10ms from Beijing, CN
166.111.74.70 AS4538 China Education and Research Network Center 2.19ms from Beijing, CN
166.111.105.60 AS4538 China Education and Research Network Center 2.37ms from Beijing, CN
166.111.51.9 AS4538 China Education and Research Network Center 2.71ms from Beijing, CN
166.111.4.19 AS4538 China Education and Research Network Center 2.44ms from Beijing, CN
166.111.100.124 AS4538 China Education and Research Network Center 2.18ms 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
84.28.161.1 AS33915 Vodafone Libertel B.V. 5.73ms from Amsterdam, NL
213.93.2.1 AS33915 Vodafone Libertel B.V. 3.80ms from Amsterdam, NL
3.161.193.17 AS16509 Amazon.com, Inc. 0.23ms from Atlanta, US
12.33.51.33 AS7018 AT&T Enterprises, LLC 3.59ms from Atlanta, US
171.102.210.1 AS7470 TRUE INTERNET Co.,Ltd. 2.25ms from Bangkok, TH
87.187.153.177 AS3320 Deutsche Telekom AG 3.03ms from Berlin, DE
181.206.101.1 AS27831 Colombia Móvil 0.71ms from Bogota, CO
20.75.89.65 AS8075 Microsoft Corporation 0.81ms from Boydton, US
2.83.33.1 AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A. 3.63ms from Braga, PT
89.40.34.1 AS34714 OPTICNET-SERV S.R.L. 1.83ms from Bucharest, RO
109.100.204.1 AS9050 Orange Romania S.A. 5.52ms from Bucharest, RO
181.164.228.1 AS7303 Telecom Argentina S.A. 1.50ms from Buenos Aires, AR
70.65.68.1 AS6327 Shaw Communications 6.74ms from Calgary, CA
124.228.21.1 AS4134 CHINANET-BACKBONE 4.50ms from Chenzhou, CN
184.17.2.1 AS5650 Frontier Communications of America, Inc. 4.49ms from Chicago, US
97.149.224.209 AS6167 Verizon Business 12.08ms from Chicago, US
207.250.135.97 AS3549 Level 3 Parent, LLC 1.07ms from Cincinnati, US
3.19.177.225 AS16509 Amazon.com, Inc. 0.17ms from Columbus, US
2.107.139.1 AS3292 TDC Holding A/S 3.15ms from Copenhagen, DK
81.237.140.1 AS3301 Telia Company AB 4.84ms from Copenhagen, DK
107.158.178.1 AS62904 Eonix Corporation 0.87ms from Dallas, US
192.68.158.1 AS14149 Icon Health & Fitness Inc 7.66ms from Draper, US
102.160.41.81 AS30999 EMTEL LIMITED 7.12ms from Ebene, MU
24.142.12.1 AS11260 EastLink 12.12ms from Edmonton, CA
174.104.43.33 AS10796 Charter Communications Inc 11.50ms from Flint, US

Traceroute

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

$
traceroute -a -n -q1 -f6 166.111.72.90
traceroute to 166.111.72.90 (166.111.72.90): 64 hops max, 52 byte packets
6 [AS4538] 101.4.130.101 2.984 ms
8 *
10 [AS4538] 118.229.4.74 4.514 ms
11 [AS4538] 118.229.2.66 4.393 ms
12 *
13 [AS4538] 166.111.72.90 4.097 ms
Measurement taken from IPinfo ProbeNet in Beijing, CN
On

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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