166.111.0.0/16

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain tsinghua.edu.cn
ASN AS4538
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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
auth:           # Filtered
remarks:        timezone GMT+8
remarks:        http://www.ccert.edu.cn
remarks:        [email protected] was validated on 2025-08-15
mnt-by:         MAINT-CERNET-AP
last-modified:  2025-11-18T00:26:28Z
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:         [email protected]
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:         [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
nic-hdl:        AC1685-AP
remarks:        Generated from irt object IRT-CERNET-AP
remarks:        [email protected] was validated on 2025-08-15
abuse-mailbox:  [email protected]
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:         [email protected]
remarks:        [email protected]
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

Nearby Ranges

BGP prefixes that overlap with 166.0.0.0/8

Range ASN Company Num of IPs
166.91.0.0/16 AS14072 District of Columbia Public Schools 65,536
166.122.0.0/16 AS6360 University of Hawaii 65,536
166.90.0.0/16 AS3257 Level 3 Parent, LLC 65,536
166.89.0.0/16 AS13918 City of Tucson 65,536
166.100.0.0/16 AS2687 AT&T Japan K.K. 65,536
166.82.0.0/16 AS7029 Windstream Communications LLC 65,536
166.84.0.0/16 AS2033 Panix 65,536
166.74.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.211.0.0/16 AS22394 Verizon Business 65,536
166.102.0.0/16 AS7029 Windstream Communications LLC 65,536
166.123.0.0/16 AS13506 United States Department of the Treasury 65,536
166.72.0.0/16 AS7018 AT&T Enterprises, LLC 65,536
166.238.0.0/16 AS26611 COMUNICACIÓN CELULAR S.A. COMCEL S.A. 65,536
166.93.0.0/16 AS26914 Synoptek, LLC 65,536
166.70.0.0/16 AS6315 XMission, L.C. 65,536
166.92.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.99.0.0/16 AS11719 Eaton Corporation 65,536
166.80.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.87.0.0/16 AS5080 Saudi Arabian Oil Company 65,536
166.19.0.0/16 AS33425 CoreWeave, Inc 65,536
166.69.0.0/16 AS19773 Motorola MNIC 65,536
166.117.0.0/16 AS16509 Amazon.com, Inc. 65,536
166.56.0.0/16 AS3371 Verizon Business 65,536
166.91.0.0/16 AS33084 District of Columbia Public Schools 65,536
166.211.0.0/16 AS6167 Verizon Business 65,536
166.58.0.0/16 AS3377 Verizon Business 65,536
166.90.0.0/16 AS3356 Level 3 Parent, LLC 65,536
166.94.0.0/16 AS3926 Fairfax County Government 65,536
166.20.0.0/16 AS243 L3Harris Technologies, Inc. 65,536
166.58.0.0/16 AS3372 Verizon Business 65,536
166.104.0.0/16 AS9321 Hanyang University 65,536
166.58.0.0/16 AS3371 Verizon Business 65,536
166.56.0.0/16 AS3372 Verizon Business 65,536
166.48.0.0/17 AS396338 Altima Telecom 32,768
166.62.128.0/17 AS5769 Videotron Ltee 32,768
166.49.0.0/17 AS3561 CenturyLink Communications, LLC 32,768
166.114.128.0/17 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 32,768
166.49.128.0/17 AS5400 communications networking services Private Unlimited Company 32,768
166.108.128.0/18 AS35077 Netwo SAS 16,384
166.114.64.0/18 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 16,384
166.113.64.0/18 AS53449 OEC Fiber 16,384
166.113.32.0/19 AS13370 Ziply Fiber 8,192
166.114.32.0/19 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 8,192
166.63.128.0/19 AS3561 CenturyLink Communications, LLC 8,192
166.63.192.0/19 AS1273 Vodafone Americas 8,192
166.113.0.0/19 AS19870 Cherry Creek School District #5 8,192
166.108.0.0/19 AS16509 Amazon.com, Inc. 8,192
166.63.160.0/19 AS1273 Vodafone Americas 8,192
166.114.16.0/20 AS6568 EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA 4,096

Hosted domains

There are 91 domain names hosted across 67 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
166.111.111.128 fineval.top 2
166.111.89.112 sunist.site 2
166.111.124.168 qhfz.cn 1
166.111.80.237 sense-lab.org 1
166.111.17.117 tiangou.space 1
166.111.41.139 bestchina.org 1
166.111.38.97 jincai.info 1
166.111.105.26 drhuyue.site 1
166.111.247.154 junhuai.fun 1
166.111.188.124 thu-psg.online 1
166.111.224.90 baobabbob.cn 1
166.111.144.129 diaopei.com 1
166.111.100.96 xn--jhqxa2d35c41a64moylppeh3bkvq404bdizavfd5tfi43l.cn 1
166.111.174.98 xwl514.me 1
166.111.94.214 tianmouc.com 1
166.111.143.3 electrolyteproject.com 1
166.111.60.68 tina.wiki 1
166.111.236.142 tsinghuaqna.cn 1
166.111.7.164 cbicr.org 1
166.111.152.159 shilab.org 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

3,069 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
166.111.7.23 AS4538 China Education and Research Network Center 2.23ms from Beijing, CN
166.111.118.49 AS4538 China Education and Research Network Center 2.57ms from Beijing, CN
166.111.189.204 AS4538 China Education and Research Network Center 2.45ms from Beijing, CN
166.111.111.1 AS4538 China Education and Research Network Center 2.40ms from Beijing, CN
166.111.188.231 AS4538 China Education and Research Network Center 2.32ms from Beijing, CN
166.111.82.58 AS4538 China Education and Research Network Center 2.43ms from Beijing, CN
166.111.27.60 AS4538 China Education and Research Network Center 2.57ms from Beijing, CN
166.111.243.80 AS4538 China Education and Research Network Center 3.10ms from Beijing, CN
166.111.223.1 AS4538 China Education and Research Network Center 3.26ms from Beijing, CN
166.111.157.118 AS4538 China Education and Research Network Center 2.49ms from Beijing, CN
166.111.92.129 AS4538 China Education and Research Network Center 3.30ms from Beijing, CN
166.111.36.1 AS4538 China Education and Research Network Center 2.19ms from Beijing, CN
166.111.216.65 AS4538 China Education and Research Network Center 3.43ms from Beijing, CN
166.111.56.1 AS4538 China Education and Research Network Center 3.95ms from Beijing, CN
166.111.247.1 AS4538 China Education and Research Network Center 2.37ms from Beijing, CN
166.111.89.61 AS4538 China Education and Research Network Center 2.24ms from Beijing, CN
166.111.14.1 AS4538 China Education and Research Network Center 4.05ms from Beijing, CN
166.111.100.75 AS4538 China Education and Research Network Center 2.17ms from Beijing, CN
166.111.218.1 AS4538 China Education and Research Network Center 3.35ms from Beijing, CN
166.111.127.28 AS4538 China Education and Research Network Center 2.60ms from Beijing, CN
166.111.240.1 AS4538 China Education and Research Network Center 2.39ms from Beijing, CN
166.111.29.129 AS4538 China Education and Research Network Center 3.72ms from Beijing, CN
166.111.115.24 AS4538 China Education and Research Network Center 2.34ms from Beijing, CN
166.111.53.163 AS4538 China Education and Research Network Center 2.10ms from Beijing, CN
166.111.185.1 AS4538 China Education and Research Network Center 2.17ms 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
130.35.80.48 AS31898 Oracle Corporation 0.41ms from Ashburn, US
160.178.165.160 AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 8.33ms from Casablanca, MA
86.15.34.48 AS5089 Virgin Media Limited 12.51ms from London, GB
90.218.140.240 AS5607 Sky UK Limited 2.43ms from London, GB
128.34.80.16 AS22 Navy Network Information Center (NNIC) 1.83ms from Los Angeles, US
105.172.87.224 AS37119 UNITEL SA 1.34ms from Luanda, AO
2.239.253.64 AS12874 Fastweb SpA 1.11ms from Milan, IT
176.120.226.176 AS42892 PE Filimonov Boris Yurievich 1.83ms from Moscow, RU
104.136.35.48 AS33363 Charter Communications, Inc 6.57ms from Orlando, US
123.134.89.192 AS4837 CHINA UNICOM China169 Backbone 6.09ms from Qingdao, CN
5.98.210.0 AS3269 Telecom Italia S.p.A. 14.76ms from Rome, IT
108.200.140.0 AS7018 AT&T Enterprises, LLC 3.34ms from San Jose, US
120.136.92.0 AS9698 LG HelloVision Corp. 5.10ms from Seoul, KR
185.68.160.0 AS49627 Speakup B.V 1.16ms from Amsterdam, NL
166.203.80.224 AS20057 AT&T Enterprises, LLC 2.11ms from Ashburn, US
173.94.170.96 AS11426 Charter Communications Inc 10.36ms from Charlotte, US
51.89.162.176 AS16276 OVH SAS 0.10ms from Erith, GB
95.40.138.80 AS16509 Amazon.com, Inc. 0.11ms from Hong Kong, HK
47.158.111.112 AS5650 Frontier Communications of America, Inc. 3.63ms from Los Angeles, US
137.236.145.160 AS27495 Open Text Corporation 3.70ms from Newark, US
97.97.21.48 AS33363 Charter Communications, Inc 5.41ms from Orlando, US
210.249.111.128 AS2516 KDDI CORPORATION 1.81ms from Osaka, JP
95.235.218.80 AS3269 Telecom Italia S.p.A. 2.77ms from Rome, IT
95.250.50.48 AS3269 Telecom Italia S.p.A. 10.02ms from Rome, IT
74.46.14.144 AS5650 Frontier Communications of America, Inc. 8.28ms from Secaucus, 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 166.111.109.16
traceroute to 166.111.109.16 (166.111.109.16): 64 hops max, 52 byte packets
9 [AS6453] 195.219.129.84 69.405 ms
10 [AS6453] 80.231.158.96 49.994 ms
11 [AS6453] 80.231.158.6 47.162 ms
12 [AS1299] 62.115.136.217 56.597 ms
13 [AS1299] 62.115.136.214 61.615 ms
14 [AS1299] 62.115.136.145 306.975 ms
15 [AS1299] 62.115.137.53 285.097 ms
16 *
17 [AS1299] 80.239.130.173 290.814 ms
18 [AS4538] 101.4.114.181 338.248 ms
19 *
20 *
21 *
22 *
23 [AS4538] 202.112.38.142 321.79 ms
24 [AS4538] 118.229.4.74 342.612 ms
25 *
26 *
27 *
28 [AS4538] 166.111.109.16 333.943 ms
Measurement taken from IPinfo ProbeNet in Dakar, SN
On

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