166.111.0.0/17

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:         [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 166.111.0.0/17

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 56 domain names hosted across 42 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
166.111.107.252 yinding.cn 2
166.111.120.113 naturechina.com.tw 2
166.111.64.129 114who.net 1
166.111.83.202 proxmox-enterprise.com 1
166.111.5.215 mbacn.edu.cn 1
166.111.70.163 celtsc.edu.cn 1
166.111.57.57 letstestthis.xyz 1
166.111.96.152 g20e.org 1
166.111.8.28 wonderarchitecture.com 1
166.111.57.26 keepy.top 1
166.111.32.226 zsxgroup.asia 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

1,913 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
166.111.111.1 AS4538 China Education and Research Network Center 2.40ms 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
166.111.92.129 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
166.111.56.1 AS4538 China Education and Research Network Center 3.95ms 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
166.111.127.28 AS4538 China Education and Research Network Center 2.60ms 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
166.111.19.33 AS4538 China Education and Research Network Center 2.27ms from Beijing, CN
166.111.34.223 AS4538 China Education and Research Network Center 2.41ms from Beijing, CN
166.111.74.67 AS4538 China Education and Research Network Center 2.19ms from Beijing, CN
166.111.84.1 AS4538 China Education and Research Network Center 2.56ms from Beijing, CN
166.111.28.47 AS4538 China Education and Research Network Center 2.25ms from Beijing, CN
166.111.60.92 AS4538 China Education and Research Network Center 2.33ms from Beijing, CN
166.111.25.93 AS4538 China Education and Research Network Center 2.33ms from Beijing, CN
166.111.80.70 AS4538 China Education and Research Network Center 2.24ms from Beijing, CN
166.111.62.1 AS4538 China Education and Research Network Center 2.27ms from Beijing, CN
166.111.99.235 AS4538 China Education and Research Network Center 2.45ms 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
196.29.224.145 AS33786 K-Net 5.12ms from Accra, GH
141.138.199.1 AS20857 Signet B.V. 1.90ms from Amsterdam, NL
184.186.253.161 AS22773 Cox Communications Inc. 1.01ms from Ashburn, US
204.63.6.1 AS398025 Cumberland Connect 7.79ms from Atlanta, US
168.245.210.1 AS395772 Augusta Health Care, Inc 3.53ms from Berkeley Springs, US
204.111.218.1 AS4922 Shenandoah Cable Television LLC 10.01ms from Berkeley Springs, US
50.228.114.177 AS7922 Comcast Cable Communications, LLC 1.50ms from Boston, US
92.82.174.1 AS9050 Orange Romania S.A. 8.37ms from Bucharest, RO
109.110.144.1 AS50181 KabelszatNet-2002. Musoreloszto es Kereskedelmi Kft. 5.49ms from Budapest, HU
46.139.198.241 AS5483 Magyar Telekom Plc. 5.19ms from Budapest, HU
190.194.224.1 AS7303 Telecom Argentina S.A. 1.38ms from Buenos Aires, AR
190.31.77.1 AS7303 Telecom Argentina S.A. 1.06ms from Buenos Aires, AR
197.46.24.17 AS8452 TE-AS 6.28ms from Cairo, EG
221.182.117.129 AS9808 China Mobile Communications Group Co., Ltd. 3.61ms from Chengdu, CN
77.75.162.65 AS15516 DKTV A/S 0.39ms from Copenhagen, DK
62.199.52.1 AS3308 Telia Company AB 0.67ms from Copenhagen, DK
47.221.38.33 AS19108 Optimum 4.97ms from Dallas, US
47.38.245.129 AS20115 Charter Communications LLC 6.13ms from Dallas, US
174.78.214.193 AS22773 Cox Communications Inc. 13.28ms from Dallas, US
172.244.1.177 AS7922 Comcast Cable Communications, LLC 1.10ms from Denver, US
91.17.201.145 AS3320 Deutsche Telekom AG 2.97ms from Duesseldorf, DE
92.26.174.17 AS13285 TalkTalk Communications Limited 2.43ms from Erith, GB
129.16.50.129 AS2841 Chalmers University of Technology 0.68ms from Goeteborg, SE
112.66.73.113 AS4134 CHINANET-BACKBONE 0.97ms from Haikou, CN
43.100.72.49 AS45102 Alibaba (US) Technology Co., Ltd. 0.64ms from Hong Kong, HK

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

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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