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:         [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 166.111.0.0/18

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 27 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
166.111.59.16 airlinedata.org 1
166.111.33.5 duffytec.cn 1
166.111.33.173 zsxgroup.asia 1
166.111.8.28 wonderarchitecture.com 1
166.111.41.139 bestchina.org 1
166.111.38.97 jincai.info 1
166.111.60.68 tina.wiki 1
166.111.61.120 gdp-lab.top 1
166.111.8.30 dns5.edu.cn 1
166.111.57.26 keepy.top 1
166.111.17.82 interact.cool 1
166.111.7.164 cbicr.org 1
166.111.32.65 mivi.name 1
166.111.17.122 magicblog.site 1
166.111.57.45 ryanhui.me 1
166.111.57.57 letstestthis.xyz 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

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

IP Address ASN Details
166.111.17.122 AS4538 China Education and Research Network Center 2.35ms from Beijing, CN
166.111.24.1 AS4538 China Education and Research Network Center 2.33ms from Beijing, CN
166.111.2.1 AS4538 China Education and Research Network Center 2.48ms from Beijing, CN
166.111.12.129 AS4538 China Education and Research Network Center 2.27ms from Beijing, CN
166.111.26.66 AS4538 China Education and Research Network Center 2.29ms from Beijing, CN
166.111.21.28 AS4538 China Education and Research Network Center 2.19ms from Beijing, CN
166.111.18.45 AS4538 China Education and Research Network Center 2.21ms from Beijing, CN
166.111.5.228 AS4538 China Education and Research Network Center 2.38ms from Beijing, CN
166.111.28.114 AS4538 China Education and Research Network Center 3.07ms from Beijing, CN
166.111.10.4 AS4538 China Education and Research Network Center 2.60ms from Beijing, CN
166.111.9.181 AS4538 China Education and Research Network Center 3.60ms from Beijing, CN
166.111.14.1 AS4538 China Education and Research Network Center 3.29ms from Tianjin, CN
166.111.7.62 AS4538 China Education and Research Network Center 2.27ms from Beijing, CN
166.111.11.1 AS4538 China Education and Research Network Center 4.09ms from Beijing, CN
166.111.27.8 AS4538 China Education and Research Network Center 3.29ms from Beijing, CN
166.111.25.5 AS4538 China Education and Research Network Center 2.66ms from Beijing, CN
166.111.32.11 AS4538 China Education and Research Network Center 2.23ms from Beijing, CN
166.111.6.70 AS4538 China Education and Research Network Center 2.54ms from Beijing, CN
166.111.19.75 AS4538 China Education and Research Network Center 2.88ms from Beijing, CN
166.111.29.129 AS4538 China Education and Research Network Center 3.69ms from Beijing, CN
166.111.15.87 AS4538 China Education and Research Network Center 2.38ms from Beijing, CN
166.111.3.254 AS4538 China Education and Research Network Center 2.12ms from Beijing, CN
166.111.16.225 AS4538 China Education and Research Network Center 2.26ms from Beijing, CN
166.111.30.63 AS4538 China Education and Research Network Center 2.60ms from Beijing, CN
166.111.4.5 AS4538 China Education and Research Network Center 2.33ms 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
139.144.164.178 AS63949 Akamai Connected Cloud 0.37ms from Atlanta, US
12.247.71.210 AS7018 AT&T Enterprises, LLC 15.30ms from Atlanta, US
98.23.147.242 AS7029 Windstream Communications LLC 6.20ms from Atlanta, US
114.23.9.114 AS56030 Voyager Internet Ltd. 0.30ms from Auckland, NZ
85.248.180.2 AS5578 SWAN, a.s. 7.05ms from Bratislava, SK
65.30.106.114 AS10796 Charter Communications Inc 2.57ms from Chicago, US
204.128.241.2 AS2381 WiscNet 3.52ms from Chicago, US
170.85.98.2 AS22616 ZSCALER, INC. 0.23ms from Dallas, US
103.149.251.2 AS135905 VIETNAM POSTS AND TELECOMMUNICATIONS GROUP 0.53ms from Ho Chi Minh City, VN
95.134.214.242 AS9304 HGC Global Communications Limited 3.00ms from Hong Kong, HK
125.244.37.114 AS9316 DACOM-PUBNETPLUS 1.93ms from Incheon, KR
58.229.141.2 AS9318 SK Broadband Co Ltd 0.94ms from Seoul, KR
58.34.178.50 AS4812 China Telecom (Group) 3.84ms from Shanghai, CN
189.231.155.50 AS8151 UNINET 11.81ms from Tucson, US
185.108.115.82 AS20857 Signet B.V. 0.58ms from Amsterdam, NL
72.251.130.2 AS398446 Cooperative Connection, LLC 6.11ms from Atlanta, US
200.21.89.130 AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC 10.67ms from Bogota, CO
86.123.81.130 AS8708 DIGI ROMANIA S.A. 4.54ms from Bucharest, RO
152.110.221.2 AS20011 Dimension Data 2.11ms from Cape Town, ZA
197.144.53.66 AS36884 Wana Corporate 7.52ms from Casablanca, MA
120.60.133.242 AS9829 National Internet Backbone 17.36ms from Chennai, IN
201.86.101.2 AS18881 TELEFÔNICA BRASIL S.A 3.61ms from Curitiba, BR
199.1.42.98 AS174 Cogent Communications, LLC 0.98ms from Dallas, US
89.252.176.18 AS51559 Netinternet Bilisim Teknolojileri AS 0.17ms from Denizli, TR
93.221.69.162 AS3320 Deutsche Telekom AG 7.09ms from Frankfurt am Main, DE

Traceroute

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

$
traceroute -a -n -q1 -f6 166.111.35.46
traceroute to 166.111.35.46 (166.111.35.46): 64 hops max, 52 byte packets
6 [AS4538] 101.4.130.105 4.236 ms
7 *
8 *
10 [AS4538] 118.229.4.74 3.731 ms
11 *
12 [AS4538] 166.111.35.46 3.668 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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