166.111.128.0/17

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 166.111.128.0/17

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 35 domain names hosted across 25 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
166.111.247.29 relics.org.cn 1
166.111.238.37 joycheck.com.cn 1
166.111.247.25 tmeg.top 1
166.111.174.98 xwl514.me 1
166.111.247.212 hepthu.com 1
166.111.247.219 enpg.cn 1
166.111.247.223 gidar.cn 1
166.111.247.154 junhuai.fun 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

1,171 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
166.111.179.37 AS4538 China Education and Research Network Center 2.23ms from Beijing, CN
166.111.141.1 AS4538 China Education and Research Network Center 3.15ms from Beijing, CN
166.111.224.61 AS4538 China Education and Research Network Center 2.27ms from Beijing, CN
166.111.214.1 AS4538 China Education and Research Network Center 2.32ms from Beijing, CN
166.111.189.204 AS4538 China Education and Research Network Center 2.57ms from Beijing, CN
166.111.143.28 AS4538 China Education and Research Network Center 2.06ms from Beijing, CN
166.111.147.129 AS4538 China Education and Research Network Center 2.49ms from Beijing, CN
166.111.247.90 AS4538 China Education and Research Network Center 2.33ms from Beijing, CN
166.111.145.224 AS4538 China Education and Research Network Center 2.29ms from Beijing, CN
166.111.149.233 AS4538 China Education and Research Network Center 3.40ms from Beijing, CN
166.111.254.1 AS4538 China Education and Research Network Center 3.89ms from Beijing, CN
166.111.242.1 AS4538 China Education and Research Network Center 2.27ms from Beijing, CN
166.111.197.1 AS4538 China Education and Research Network Center 3.26ms from Beijing, CN
166.111.190.1 AS4538 China Education and Research Network Center 2.67ms from Beijing, CN
166.111.232.1 AS4538 China Education and Research Network Center 2.19ms from Beijing, CN
166.111.158.36 AS4538 China Education and Research Network Center 2.62ms from Beijing, CN
166.111.245.226 AS4538 China Education and Research Network Center 2.42ms from Beijing, CN
166.111.243.80 AS4538 China Education and Research Network Center 2.87ms from Beijing, CN
166.111.234.1 AS4538 China Education and Research Network Center 2.21ms from Beijing, CN
166.111.208.164 AS4538 China Education and Research Network Center 3.34ms from Beijing, CN
166.111.219.206 AS4538 China Education and Research Network Center 2.30ms from Beijing, CN
166.111.156.41 AS4538 China Education and Research Network Center 2.20ms from Beijing, CN
166.111.174.99 AS4538 China Education and Research Network Center 2.37ms from Beijing, CN
166.111.188.131 AS4538 China Education and Research Network Center 2.45ms from Beijing, CN
166.111.212.1 AS4538 China Education and Research Network Center 2.34ms 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
188.202.1.1 AS1136 KPN B.V. 2.71ms from Amsterdam, NL
217.166.1.33 AS1136 KPN B.V. 1.55ms from Amsterdam, NL
23.244.189.1 AS11776 Breezeline 14.55ms from Ashburn, US
75.138.78.1 AS20115 Charter Communications LLC 4.85ms from Atlanta, US
68.1.152.1 AS22773 Cox Communications Inc. 3.63ms from Atlanta, US
8.227.81.1 AS3356 Level 3 Parent, LLC 0.37ms from Atlanta, US
69.1.241.1 AS398025 Cumberland Connect 8.65ms from Atlanta, US
85.132.121.49 AS206977 STATE SERVICE OF SPECIAL COMMUNICATION AND INFORMATION SECURITY OF THE REPUBLIC OF AZERBAIJAN 1.78ms from Baku, AZ
216.57.81.193 AS32622 Towerstream I, Inc. 3.49ms from Boston, US
116.162.161.33 AS4837 CHINA UNICOM China169 Backbone 5.92ms from Changsha, CN
108.80.128.161 AS7018 AT&T Enterprises, LLC 8.06ms from Chicago, US
208.101.137.1 AS7029 Windstream Communications LLC 8.37ms from Chicago, US
72.49.95.1 AS6181 Cincinnati Bell Telephone Company LLC 2.78ms from Cincinnati, US
65.22.173.17 AS12041 Afilias, Inc. 0.12ms from Dallas, US
68.11.92.1 AS22773 Cox Communications Inc. 12.95ms from Dallas, US
206.126.43.97 AS25956 Logix 0.44ms from Dallas, US
115.254.35.193 AS18101 Reliance Communications Ltd.DAKC MUMBAI 2.04ms from Delhi, IN
24.96.41.1 AS12083 WideOpenWest Finance LLC 11.16ms from Detroit, US
193.103.165.1 AS3320 Deutsche Telekom AG 4.13ms from Duesseldorf, DE
83.246.17.1 AS24679 kyberio GmbH 6.20ms from Frankfurt am Main, DE
23.173.240.1 AS54364 Rosen Research LLC 0.23ms from Fremont, US
177.242.32.1 AS13999 Mega Cable, S.A. de C.V. 13.04ms from Guadalajara, MX
149.249.123.1 AS29505 Stadtwerke Luebeck Digital GmbH 1.29ms from Hamburg, DE
80.228.217.97 AS9145 EWE TEL GmbH 6.39ms from Hamburg, DE
193.65.205.129 AS719 Elisa Oyj 1.20ms from Helsinki, FI

Traceroute

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

$
traceroute -a -n -q1 -m15 166.111.136.101
traceroute to 166.111.136.101 (166.111.136.101): 15 hops max, 52 byte packets
3 *
4 *
5 *
6 [AS6939] 184.105.80.14 36.535 ms
7 *
8 *
9 [] 123.255.91.118 213.635 ms
10 *
11 *
12 [AS4538] 101.4.117.81 236.074 ms
13 *
14 *
15 *
Measurement taken from IPinfo ProbeNet in Sandefjord, NO
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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