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:         [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 166.111.128.0/17

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
166.111.224.30 qdlabthu.com 1
166.111.247.219 enpg.cn 1
166.111.215.133 experter.com.cn 1
166.111.186.31 pypyep.cn 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

1,156 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
166.111.189.204 AS4538 China Education and Research Network Center 2.45ms from Beijing, CN
166.111.188.231 AS4538 China Education and Research Network Center 2.32ms from Beijing, CN
166.111.243.80 AS4538 China Education and Research Network Center 3.10ms from Beijing, CN
166.111.223.1 AS4538 China Education and Research Network Center 3.26ms from Beijing, CN
166.111.157.118 AS4538 China Education and Research Network Center 2.49ms from Beijing, CN
166.111.216.65 AS4538 China Education and Research Network Center 3.43ms from Beijing, CN
166.111.247.1 AS4538 China Education and Research Network Center 2.37ms from Beijing, CN
166.111.218.1 AS4538 China Education and Research Network Center 3.35ms from Beijing, CN
166.111.240.1 AS4538 China Education and Research Network Center 2.39ms from Beijing, CN
166.111.185.1 AS4538 China Education and Research Network Center 2.17ms from Beijing, CN
166.111.192.122 AS4538 China Education and Research Network Center 2.04ms from Beijing, CN
166.111.148.220 AS4538 China Education and Research Network Center 2.47ms from Beijing, CN
166.111.241.193 AS4538 China Education and Research Network Center 2.62ms from Beijing, CN
166.111.153.182 AS4538 China Education and Research Network Center 2.52ms from Beijing, CN
166.111.253.2 AS4538 China Education and Research Network Center 3.02ms from Beijing, CN
166.111.248.1 AS4538 China Education and Research Network Center 3.64ms from Beijing, CN
166.111.224.200 AS4538 China Education and Research Network Center 2.14ms from Beijing, CN
166.111.159.1 AS4538 China Education and Research Network Center 2.57ms from Beijing, CN
166.111.141.1 AS4538 China Education and Research Network Center 3.01ms from Beijing, CN
166.111.219.206 AS4538 China Education and Research Network Center 2.31ms from Beijing, CN
166.111.238.80 AS4538 China Education and Research Network Center 2.23ms from Beijing, CN
166.111.180.2 AS4538 China Education and Research Network Center 2.02ms from Beijing, CN
166.111.144.1 AS4538 China Education and Research Network Center 3.91ms from Beijing, CN
166.111.152.252 AS4538 China Education and Research Network Center 2.46ms from Beijing, CN
166.111.143.2 AS4538 China Education and Research Network Center 2.22ms 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
83.247.73.129 AS12414 Solcon Internetdiensten B.V. 1.19ms from Amsterdam, NL
173.79.154.1 AS701 Verizon Business 1.55ms from Ashburn, US
84.254.50.49 AS25472 Nova Telecommunications & Media Single Member S.A 7.83ms from Athens, GR
143.59.104.1 AS12083 WideOpenWest Finance LLC 10.18ms from Atlanta, US
161.246.84.1 AS9486 King Mongkut's Institute of Technology Ladkrabang 2.50ms from Bangkok, TH
114.251.11.161 AS4808 China Unicom Beijing Province Network 3.95ms from Beijing, CN
181.235.109.177 AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC 19.93ms from Bogota, CO
212.72.221.177 AS205132 Vivacom Bulgaria EAD 9.53ms from Bucharest, RO
175.5.57.65 AS4134 CHINANET-BACKBONE 6.60ms from Changsha, CN
205.142.77.33 AS15129 Geneseo Telephone Company 3.30ms from Chicago, US
75.128.138.1 AS20115 Charter Communications LLC 10.28ms from Chicago, US
172.76.247.17 AS5650 Frontier Communications of America, Inc. 12.90ms from Chicago, US
14.104.228.1 AS4134 CHINANET-BACKBONE 1.55ms from Chongqing, CN
66.213.77.1 AS26923 Ohio Public Library Information Network (OPLIN) 9.70ms from Columbus, US
104.153.69.1 AS46399 Wavelinc Communications LLC 2.81ms from Columbus, US
190.17.39.1 AS7303 Telecom Argentina S.A. 0.70ms from Cordoba, AR
146.6.189.1 AS18 University of Texas at Austin 5.92ms from Dallas, US
12.163.141.81 AS7018 AT&T Enterprises, LLC 9.91ms from Dallas, US
70.65.196.1 AS6327 Shaw Communications 2.75ms from Edmonton, CA
179.154.238.1 AS28573 Claro NXT Telecomunicacoes Ltda 11.99ms from Fortaleza, BR
93.181.47.1 AS42965 net services Beteiligungsgesellschaft mbH trading as net services GmbH & Co. KG 0.37ms from Frankfurt am Main, DE
218.86.62.81 AS4134 CHINANET-BACKBONE 5.68ms from Fuzhou, CN
58.22.136.1 AS4837 CHINA UNICOM China169 Backbone 7.52ms from Fuzhou, CN
61.145.165.1 AS4134 CHINANET-BACKBONE 1.14ms from Guangzhou, CN
183.238.183.193 AS9808 China Mobile Communications Group Co., Ltd. 6.58ms from Guangzhou, CN

Traceroute

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

$
traceroute -a -n -q1 -f2 166.111.170.1
traceroute to 166.111.170.1 (166.111.170.1): 64 hops max, 52 byte packets
2 [AS749] 11.73.4.241 2.22 ms
3 *
4 *
5 [AS2914] 128.241.12.1 1.639 ms
6 *
7 *
8 [AS2914] 129.250.2.51 154.705 ms
9 [AS2914] 129.250.2.189 150.22 ms
10 [AS2914] 203.131.254.214 153.119 ms
11 [AS4538] 101.4.114.221 191.805 ms
12 [AS4538] 101.4.116.121 186.153 ms
13 *
14 *
15 *
16 *
17 [AS4538] 202.112.38.142 186.354 ms
18 [AS4538] 118.229.4.70 188.31 ms
19 [AS4538] 118.229.4.78 185.501 ms
20 [AS4538] 118.229.2.78 187.435 ms
21 [AS4538] 166.111.170.1 185.137 ms
Measurement taken from IPinfo ProbeNet in Santa Clara, 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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