166.111.192.0/18

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 166.111.192.0/18

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 16 domain names hosted across 15 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
166.111.238.247 closedai.top 1
166.111.247.25 tmeg.top 1
166.111.224.90 baobabbob.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

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

IP Address ASN Details
166.111.244.223 AS4538 China Education and Research Network Center 2.46ms from Beijing, CN
166.111.215.140 AS4538 China Education and Research Network Center 3.33ms from Beijing, CN
166.111.239.48 AS4538 China Education and Research Network Center 2.23ms from Beijing, CN
166.111.213.1 AS4538 China Education and Research Network Center 4.22ms from Beijing, CN
166.111.237.12 AS4538 China Education and Research Network Center 2.17ms from Beijing, CN
166.111.222.1 AS4538 China Education and Research Network Center 3.37ms from Beijing, CN
166.111.243.156 AS4538 China Education and Research Network Center 3.02ms from Beijing, CN
166.111.214.1 AS4538 China Education and Research Network Center 2.17ms from Beijing, CN
166.111.245.226 AS4538 China Education and Research Network Center 2.70ms from Beijing, CN
166.111.248.1 AS4538 China Education and Research Network Center 3.48ms from Beijing, CN
166.111.241.193 AS4538 China Education and Research Network Center 2.36ms from Beijing, CN
166.111.216.1 AS4538 China Education and Research Network Center 3.29ms from Beijing, CN
166.111.238.171 AS4538 China Education and Research Network Center 2.23ms from Beijing, CN
166.111.242.1 AS4538 China Education and Research Network Center 2.27ms from Beijing, CN
166.111.192.105 AS4538 China Education and Research Network Center 2.10ms from Beijing, CN
166.111.196.4 AS4538 China Education and Research Network Center 2.53ms from Beijing, CN
166.111.219.206 AS4538 China Education and Research Network Center 2.38ms from Beijing, CN
166.111.253.1 AS4538 China Education and Research Network Center 3.15ms from Beijing, CN
166.111.246.88 AS4538 China Education and Research Network Center 3.28ms from Beijing, CN
166.111.234.10 AS4538 China Education and Research Network Center 2.36ms from Beijing, CN
166.111.240.1 AS4538 China Education and Research Network Center 2.73ms from Beijing, CN
166.111.236.41 AS4538 China Education and Research Network Center 2.29ms from Beijing, CN
166.111.194.1 AS4538 China Education and Research Network Center 3.43ms from Beijing, CN
166.111.208.47 AS4538 China Education and Research Network Center 2.94ms from Beijing, CN
166.111.247.161 AS4538 China Education and Research Network Center 2.26ms 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
8.37.35.2 AS35963 Greenville-Spartanburg Airport Commission 5.56ms from Atlanta, US
68.160.137.2 AS701 Verizon Business 2.55ms from Boston, US
73.142.229.18 AS7922 Comcast Cable Communications, LLC 9.25ms from Boston, US
12.251.60.34 AS7018 AT&T Enterprises, LLC 2.32ms from Chicago, US
81.230.249.2 AS3301 Telia Company AB 3.60ms from Copenhagen, DK
109.56.253.194 AS44034 Hi3G Access AB 6.87ms from Copenhagen, DK
183.56.121.2 AS4134 CHINANET-BACKBONE 8.56ms from Guangzhou, CN
210.6.245.226 AS9269 Hong Kong Broadband Network Ltd. 1.17ms from Hong Kong, HK
206.42.127.2 AS133495 Vision telecom Private limited 2.58ms from Lahore, PK
86.221.146.114 AS3215 Orange S.A. 5.12ms from Marseille, FR
79.220.52.226 AS3320 Deutsche Telekom AG 4.68ms from Nuernberg, DE
187.23.135.242 AS28573 Claro NXT Telecomunicacoes Ltda 13.96ms from Porto Alegre, BR
73.98.243.18 AS7922 Comcast Cable Communications, LLC 2.69ms from Salt Lake City, US
76.246.4.226 AS7018 AT&T Enterprises, LLC 18.55ms from San Jose, US
189.7.152.34 AS28573 Claro NXT Telecomunicacoes Ltda 3.16ms from Sao Paulo, BR
39.115.52.146 AS9318 SK Broadband Co Ltd 1.52ms from Seoul, KR
13.55.168.226 AS16509 Amazon.com, Inc. 0.10ms from Sydney, AU
46.159.231.226 AS12389 PJSC Rostelecom 14.44ms from Tbilisi, GE
98.71.239.114 AS8075 Microsoft Corporation 1.29ms from Amsterdam, NL
75.171.92.114 AS19901 Brightspeed 14.00ms from Ashburn, US
50.171.172.34 AS7922 Comcast Cable Communications, LLC 1.25ms from Chicago, US
13.59.238.162 AS16509 Amazon.com, Inc. 0.17ms from Columbus, US
90.247.135.130 AS5378 Vodafone Limited 8.29ms from Edinburgh, GB
206.238.185.98 AS399077 Tcloudnet 0.95ms from Hong Kong, HK
195.103.133.146 AS3269 Telecom Italia S.p.A. 1.73ms from Naples, IT

Traceroute

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

$
traceroute -a -n -q1 -f2 166.111.204.6
traceroute to 166.111.204.6 (166.111.204.6): 64 hops max, 52 byte packets
2 [] 91.200.241.196 0.297 ms
3 [] 91.200.241.73 5.494 ms
4 [AS10099] 162.255.48.9 7.018 ms
6 [AS10099] 162.255.48.201 147.593 ms
7 [] 210.78.28.149 155.279 ms
8 [] 210.78.30.158 152.667 ms
9 *
10 [AS4837] 219.158.34.34 173.461 ms
11 *
12 [AS4538] 101.4.113.234 189.582 ms
13 [AS4538] 202.112.38.2 169.967 ms
14 [AS4538] 118.229.4.74 174.588 ms
15 [AS4538] 118.229.2.66 170.54 ms
16 [AS4538] 118.229.8.6 170.415 ms
17 *
18 [AS4538] 166.111.204.6 174.215 ms
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
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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