166.111.0.0/18

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 166.111.0.0/18

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 28 domain names hosted across 20 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
166.111.33.148 love0821.top 1
166.111.60.68 tina.wiki 1
166.111.8.28 wonderarchitecture.com 1
166.111.17.82 interact.cool 1
166.111.57.26 keepy.top 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

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

IP Address ASN Details
166.111.7.155 AS4538 China Education and Research Network Center 2.24ms from Beijing, CN
166.111.5.214 AS4538 China Education and Research Network Center 2.23ms from Beijing, CN
166.111.11.1 AS4538 China Education and Research Network Center 3.81ms from Beijing, CN
166.111.15.87 AS4538 China Education and Research Network Center 2.37ms from Beijing, CN
166.111.2.1 AS4538 China Education and Research Network Center 2.74ms from Beijing, CN
166.111.12.129 AS4538 China Education and Research Network Center 2.61ms from Beijing, CN
166.111.4.135 AS4538 China Education and Research Network Center 2.31ms from Beijing, CN
166.111.16.225 AS4538 China Education and Research Network Center 2.52ms from Beijing, CN
166.111.6.165 AS4538 China Education and Research Network Center 2.40ms from Beijing, CN
166.111.10.1 AS4538 China Education and Research Network Center 4.36ms from Beijing, CN
166.111.14.1 AS4538 China Education and Research Network Center 3.76ms from Beijing, CN
166.111.9.181 AS4538 China Education and Research Network Center 3.83ms from Beijing, CN
166.111.3.254 AS4538 China Education and Research Network Center 2.10ms from Beijing, CN
166.111.34.223 AS4538 China Education and Research Network Center 2.52ms from Beijing, CN
166.111.54.43 AS4538 China Education and Research Network Center 2.24ms from Beijing, CN
166.111.19.33 AS4538 China Education and Research Network Center 2.26ms from Beijing, CN
166.111.33.73 AS4538 China Education and Research Network Center 2.09ms from Beijing, CN
166.111.26.1 AS4538 China Education and Research Network Center 2.52ms from Beijing, CN
166.111.48.27 AS4538 China Education and Research Network Center 2.52ms from Beijing, CN
166.111.59.92 AS4538 China Education and Research Network Center 2.29ms from Beijing, CN
166.111.40.16 AS4538 China Education and Research Network Center 2.28ms from Beijing, CN
166.111.56.1 AS4538 China Education and Research Network Center 3.97ms from Beijing, CN
166.111.62.1 AS4538 China Education and Research Network Center 2.49ms from Beijing, CN
166.111.57.81 AS4538 China Education and Research Network Center 2.34ms from Beijing, CN
166.111.58.171 AS4538 China Education and Research Network Center 2.42ms 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
213.124.191.2 AS33915 Vodafone Libertel B.V. 1.17ms from Amsterdam, NL
34.145.134.2 AS396982 Google LLC 0.12ms from Ashburn, US
183.196.182.194 AS24547 Hebei Mobile Communication Company Limited 8.03ms from Beijing, CN
200.91.255.114 AS18747 IFX Corporation 0.42ms from Bogota, CO
204.89.225.2 AS394679 Generac Power Systems, Inc. 4.52ms from Chicago, US
119.84.72.210 AS134420 Chongqing Telecom 0.95ms from Chongqing, CN
192.34.112.2 AS1097 Core Transit LLC 0.17ms from Dallas, US
5.89.14.2 AS30722 Vodafone Italia S.p.A. 1.77ms from Milan, IT
210.10.240.210 AS2764 AAPT Limited 0.96ms from Sydney, AU
99.227.83.66 AS812 Rogers Communications Canada Inc. 5.96ms from Toronto, CA
67.60.65.98 AS11492 CABLE ONE, INC. 13.20ms from Atlanta, US
99.151.47.18 AS7018 AT&T Enterprises, LLC 11.17ms from Atlanta, US
49.231.78.2 AS133848 Internet Datacenter Network 1.80ms from Bangkok, TH
198.236.184.2 AS40583 Columbia Gorge Education Service District 3.15ms from Bend, US
80.137.65.18 AS3320 Deutsche Telekom AG 1.84ms from Berlin, DE
199.189.195.162 AS13886 Cloud South 1.44ms from Boca Raton, US
20.242.71.162 AS8075 Microsoft Corporation 0.26ms from Boydton, US
73.211.224.162 AS7922 Comcast Cable Communications, LLC 5.41ms from Chicago, US
24.172.222.162 AS10796 Charter Communications Inc 4.29ms from Columbus, US
185.10.8.2 AS51468 One.com A/S 0.81ms from Copenhagen, DK
47.190.83.130 AS5650 Frontier Communications of America, Inc. 2.23ms from Dallas, US
73.26.201.210 AS7922 Comcast Cable Communications, LLC 12.01ms from Denver, US
64.77.251.18 AS36103 Central Utah Telephone, Inc. 1.09ms from Draper, US
194.251.206.194 AS1759 Telia Finland Oyj 0.79ms from Helsinki, FI
176.224.204.66 AS35819 Etihad Etisalat, a joint stock company 2.89ms from Jeddah, SA

Traceroute

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

$
traceroute -a -n -q1 -f4 -m12 166.111.20.28
traceroute to 166.111.20.28 (166.111.20.28): 12 hops max, 52 byte packets
5 *
6 *
7 *
8 [] 123.255.91.118 163.936 ms
9 [AS4538] 101.4.114.181 197.387 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Nairobi, KE
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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