166.111.128.0/18

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 166.111.128.0/18

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 19 domain names hosted across 10 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
166.111.138.106 chinasorry.com 1
166.111.188.124 thu-psg.online 1
166.111.143.3 electrolyteproject.com 1
166.111.144.129 diaopei.com 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

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

IP Address ASN Details
166.111.188.131 AS4538 China Education and Research Network Center 2.33ms from Beijing, CN
166.111.169.83 AS4538 China Education and Research Network Center 3.88ms from Tianjin, CN
166.111.174.99 AS4538 China Education and Research Network Center 2.32ms from Beijing, CN
166.111.151.24 AS4538 China Education and Research Network Center 4.37ms from Beijing, CN
166.111.159.1 AS4538 China Education and Research Network Center 2.43ms from Beijing, CN
166.111.179.37 AS4538 China Education and Research Network Center 2.41ms from Beijing, CN
166.111.184.1 AS4538 China Education and Research Network Center 3.21ms from Beijing, CN
166.111.141.1 AS4538 China Education and Research Network Center 3.01ms from Beijing, CN
166.111.143.2 AS4538 China Education and Research Network Center 2.48ms from Beijing, CN
166.111.178.14 AS4538 China Education and Research Network Center 2.33ms from Beijing, CN
166.111.180.61 AS4538 China Education and Research Network Center 2.23ms from Beijing, CN
166.111.152.131 AS4538 China Education and Research Network Center 2.31ms from Beijing, CN
166.111.168.8 AS4538 China Education and Research Network Center 2.24ms from Beijing, CN
166.111.176.21 AS4538 China Education and Research Network Center 2.32ms from Beijing, CN
166.111.191.184 AS4538 China Education and Research Network Center 2.35ms from Beijing, CN
166.111.154.38 AS4538 China Education and Research Network Center 2.31ms from Beijing, CN
166.111.146.244 AS4538 China Education and Research Network Center 2.37ms from Beijing, CN
166.111.150.224 AS4538 China Education and Research Network Center 2.50ms from Beijing, CN
166.111.144.1 AS4538 China Education and Research Network Center 3.92ms from Beijing, CN
166.111.156.80 AS4538 China Education and Research Network Center 2.22ms from Beijing, CN
166.111.177.129 AS4538 China Education and Research Network Center 3.68ms from Tianjin, CN
166.111.186.227 AS4538 China Education and Research Network Center 2.65ms from Beijing, CN
166.111.170.1 AS4538 China Education and Research Network Center 3.61ms from Beijing, CN
166.111.190.1 AS4538 China Education and Research Network Center 2.42ms from Beijing, CN
166.111.158.39 AS4538 China Education and Research Network Center 2.57ms 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
89.220.19.130 AS33915 Vodafone Libertel B.V. 1.47ms from Amsterdam, NL
80.85.28.130 AS41697 Hellas Sat Consortium Ltd 1.57ms from Athens, GR
12.56.111.114 AS7018 AT&T Enterprises, LLC 9.02ms from Chicago, US
192.48.210.178 AS6305 Alliance Entertainment 8.61ms from Columbus, US
3.249.136.210 AS16509 Amazon.com, Inc. 0.22ms from Dublin, IE
89.100.153.146 AS6830 Liberty Global B.V. 4.01ms from Dublin, IE
217.84.16.146 AS3320 Deutsche Telekom AG 7.51ms from Frankfurt am Main, DE
212.247.31.18 AS1257 Tele2 Sverige AB 4.52ms from Goeteborg, SE
193.10.223.2 AS1653 Vetenskapsradet / SUNET 4.02ms from Goeteborg, SE
141.239.96.2 AS36149 Hawaiian Telcom Services Company, Inc. 1.82ms from Honolulu, US
162.218.231.162 AS40156 The Optimal Link Corporation 0.23ms from Houston, US
115.240.26.2 AS55836 Reliance Jio Infocomm Limited 1.34ms from Kolkata, IN
218.25.53.82 AS4837 CHINA UNICOM China169 Backbone 12.27ms from Liaoyang, CN
77.224.115.2 AS12430 VODAFONE ESPANA S.A.U. 0.76ms from Madrid, ES
142.105.153.18 AS11351 Charter Communications Inc 12.12ms from New York City, US
13.208.77.130 AS16509 Amazon.com, Inc. 0.28ms from Osaka, JP
60.106.177.50 AS17676 SoftBank Corp. 3.62ms from Osaka, JP
52.108.86.2 AS8075 Microsoft Corporation 0.23ms from Osaka, JP
88.188.153.194 AS12322 Free SAS 4.10ms from Paris, FR
50.240.22.66 AS7922 Comcast Cable Communications, LLC 5.58ms from Portland, US
88.45.121.34 AS3269 Telecom Italia S.p.A. 10.97ms from Rome, IT
192.254.170.2 AS46606 Unified Layer 1.96ms from Salt Lake City, US
1.116.100.146 AS45090 Shenzhen Tencent Computer Systems Company Limited 1.29ms from Shanghai, CN
1.92.111.194 AS55990 Huawei Cloud Service data center 3.60ms from Tianjin, CN
85.233.202.178 AS15830 Equinix (EMEA) Acquisition Enterprises B.V. 0.32ms from Aubervilliers, FR

Traceroute

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

$
traceroute -a -n -q1 -f2 -m14 166.111.171.18
traceroute to 166.111.171.18 (166.111.171.18): 14 hops max, 52 byte packets
2 [AS53340] 192.228.109.93 204.362 ms
3 [AS53667] 198.251.87.1 0.775 ms
4 *
5 *
6 *
7 [] 123.255.91.118 152.432 ms
8 *
9 *
10 [AS4538] 101.4.117.81 172.438 ms
11 [AS4538] 101.4.115.145 172.562 ms
12 *
13 *
14 *
Measurement taken from IPinfo ProbeNet in Las Vegas, US
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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