166.111.64.0/18

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:         [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

Overlapping Ranges

BGP prefixes that contain 166.111.64.0/18

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 22 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
166.111.111.128 fineval.top 2
166.111.77.32 tedhub.cn 2
166.111.96.189 szbabys.com 2
166.111.120.113 naturechina.com.cn 2
166.111.107.252 yinding.cn 2
166.111.70.163 celtsc.edu.cn 1
166.111.64.129 114who.net 1
166.111.80.114 jingjuplus.cn 1
166.111.100.96 xn--jhqxa2d35c41a64moylppeh3bkvq404bdizavfd5tfi43l.cn 1
166.111.83.202 proxmox-enterprise.com 1
166.111.83.75 finall1008.top 1
166.111.80.66 ssast.net 1
166.111.81.33 qrimalne.uk 1
166.111.94.204 tianmouc.com 1
166.111.96.152 g20e.org 1
166.111.124.168 qhfz.cn 1
166.111.80.237 sense-lab.org 1
166.111.98.101 liujingming.com 1
166.111.86.30 thuse408.xin 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

1,045 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
166.111.96.40 AS4538 China Education and Research Network Center 3.55ms from Beijing, CN
166.111.114.1 AS4538 China Education and Research Network Center 3.28ms from Beijing, CN
166.111.107.202 AS4538 China Education and Research Network Center 3.32ms from Beijing, CN
166.111.84.1 AS4538 China Education and Research Network Center 4.99ms from Beijing, CN
166.111.120.253 AS4538 China Education and Research Network Center 4.65ms from Beijing, CN
166.111.83.87 AS4538 China Education and Research Network Center 3.24ms from Beijing, CN
166.111.76.1 AS4538 China Education and Research Network Center 3.34ms from Beijing, CN
166.111.89.74 AS4538 China Education and Research Network Center 2.32ms from Beijing, CN
166.111.121.32 AS4538 China Education and Research Network Center 4.19ms from Beijing, CN
166.111.94.202 AS4538 China Education and Research Network Center 3.43ms from Beijing, CN
166.111.91.139 AS4538 China Education and Research Network Center 2.45ms from Beijing, CN
166.111.80.32 AS4538 China Education and Research Network Center 3.20ms from Tianjin, CN
166.111.98.108 AS4538 China Education and Research Network Center 3.39ms from Beijing, CN
166.111.99.224 AS4538 China Education and Research Network Center 2.67ms from Beijing, CN
166.111.119.172 AS4538 China Education and Research Network Center 2.55ms from Beijing, CN
166.111.78.161 AS4538 China Education and Research Network Center 3.08ms from Tianjin, CN
166.111.110.91 AS4538 China Education and Research Network Center 3.38ms from Beijing, CN
166.111.92.129 AS4538 China Education and Research Network Center 3.36ms from Beijing, CN
166.111.116.225 AS4538 China Education and Research Network Center 3.96ms from Beijing, CN
166.111.109.20 AS4538 China Education and Research Network Center 3.47ms from Beijing, CN
166.111.124.1 AS4538 China Education and Research Network Center 4.02ms from Beijing, CN
166.111.79.25 AS4538 China Education and Research Network Center 3.35ms from Tianjin, CN
166.111.105.61 AS4538 China Education and Research Network Center 3.31ms from Beijing, CN
166.111.127.145 AS4538 China Education and Research Network Center 3.34ms from Beijing, CN
166.111.82.147 AS4538 China Education and Research Network Center 3.68ms 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
107.127.53.2 AS7018 AT&T Enterprises, LLC 5.50ms from Atlanta, US
50.121.31.162 AS5650 Frontier Communications of America, Inc. 12.07ms from Chicago, US
62.4.75.18 AS13237 euNetworks GmbH 0.40ms from Frankfurt am Main, DE
93.225.242.114 AS3320 Deutsche Telekom AG 9.36ms from Frankfurt am Main, DE
41.173.215.130 AS36937 Liquid Telecommunications South Africa (Pty) Ltd 10.76ms from Gaborone, BW
173.172.32.2 AS11427 Charter Communications Inc 12.29ms from Houston, US
161.23.233.2 AS198864 Queen Mary and Westfield College, University of London 1.52ms from London, GB
38.49.51.226 AS8796 FASTNET DATA INC 0.27ms from Los Angeles, US
38.39.190.2 AS21554 Wisconsin CyberLynk Network, Inc. 0.17ms from Milwaukee, US
41.89.157.2 AS36914 Kenya Education Network 8.95ms from Nairobi, KE
111.2.26.50 AS56041 China Mobile communications corporation 5.83ms from Ningbo, CN
201.10.50.178 AS8167 V tal 1.91ms from Novo Hamburgo, BR
91.202.54.2 AS20609 KAZA.cz s.r.o. 5.93ms from Prague, CZ
76.118.66.194 AS7922 Comcast Cable Communications, LLC 8.19ms from Providence, US
181.14.254.130 AS7303 Telecom Argentina S.A. 0.57ms from Rosario, AR
5.54.92.178 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 5.25ms from Athens, GR
104.222.36.82 AS19084 ColoUp 0.18ms from Buffalo, US
66.56.165.242 AS11426 Charter Communications Inc 10.96ms from Charlotte, US
45.42.45.2 AS30058 FDCservers.net 1.30ms from Hong Kong, HK
172.253.66.98 AS15169 Google LLC 0.26ms from London, GB
112.211.87.194 AS9299 Philippine Long Distance Telephone Company 0.78ms from Manila, PH
199.188.125.2 AS23314 Summit Broadband 4.65ms from Miami, US
109.173.17.130 AS42610 PJSC Rostelecom 1.50ms from Moscow, RU
103.61.108.162 AS133720 Zess Networks Private Limited 1.18ms from Mumbai, IN
173.10.214.242 AS7922 Comcast Cable Communications, LLC 6.73ms from Murfreesboro, 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 166.111.97.221
traceroute to 166.111.97.221 (166.111.97.221): 64 hops max, 52 byte packets
6 [AS4538] 101.4.130.101 3.089 ms
8 *
10 [AS4538] 118.229.4.70 3.024 ms
11 [AS4538] 118.229.4.78 3.947 ms
12 [AS4538] 118.229.2.78 311.104 ms
13 [AS4538] 118.229.2.38 3.728 ms
14 [AS4538] 118.229.2.6 4.483 ms
15 *
16 [AS4538] 166.111.97.221 6.875 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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