166.111.5.0/24

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:         abuse@cernet.edu.cn
abuse-mailbox:  abuse@cernet.edu.cn
admin-c:        CER-AP
tech-c:         CER-AP
auth:           # Filtered
remarks:        timezone GMT+8
remarks:        http://www.ccert.edu.cn
remarks:        abuse@cernet.edu.cn 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:         hostmaster@cernic.net
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:         abuse@cernet.edu.cn
admin-c:        CER-AP
tech-c:         CER-AP
nic-hdl:        AC1685-AP
remarks:        Generated from irt object IRT-CERNET-AP
remarks:        abuse@cernet.edu.cn was validated on 2025-08-15
abuse-mailbox:  abuse@cernet.edu.cn
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:         helpdesk@cernet.edu.cn
remarks:        abuse@cernet.edu.cn
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 166.111.5.0/24

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 2 domain names hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
166.111.5.193	youngcow.net	1
166.111.5.215	mbacn.edu.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

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Pingable IPs

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

IP Address	ASN	Details
166.111.5.231	AS4538 China Education and Research Network Center	`2.15ms` 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
45.58.147.216	AS46844 Sharktech	`0.30ms` from Amsterdam, NL
40.71.46.184	AS8075 Microsoft Corporation	`0.44ms` from Ashburn, US
188.44.91.168	AS6848 Telenet BV	`6.79ms` from Brussels, BE
23.163.216.24	AS393336 Catalyst Host LLC	`0.03ms` from Dallas, US
187.133.187.104	AS8151 UNINET	`5.17ms` from Guadalajara, MX
171.231.237.232	AS7552 Viettel Group	`3.02ms` from Hanoi, VN
70.179.185.232	AS22773 Cox Communications Inc.	`7.66ms` from Kansas City, US
3.111.224.168	AS16509 Amazon.com, Inc.	`0.12ms` from Mumbai, IN
69.247.149.216	AS7922 Comcast Cable Communications, LLC	`6.82ms` from Murfreesboro, US
68.164.215.24	AS3257 GTT Communications Inc.	`0.48ms` from New York City, US
100.2.238.56	AS701 Verizon Business	`1.85ms` from New York City, US
87.88.73.8	AS5410 Bouygues Telecom SA	`5.57ms` from Paris, FR
112.239.243.152	AS4837 CHINA UNICOM China169 Backbone	`8.28ms` from Qingdao, CN
84.208.218.216	AS25400 Telia Norge AS	`6.90ms` from Sandefjord, NO
77.29.68.72	AS6821 Makedonski Telekom AD-Skopje	`7.05ms` from Skopje, MK
1.171.155.104	AS3462 Data Communication Business Group	`1.51ms` from Taipei, TW
199.254.123.40	AS16406 Intermedia.net, Inc.	`1.37ms` from Ashburn, US
108.48.72.168	AS701 Verizon Business	`2.13ms` from Ashburn, US
40.121.254.136	AS8075 Microsoft Corporation	`0.43ms` from Ashburn, US
109.136.172.184	AS5432 Proximus NV	`1.28ms` from Brussels, BE
207.181.226.72	AS6079 RCN	`4.54ms` from Chicago, US
108.192.122.184	AS7018 AT&T Enterprises, LLC	`19.70ms` from Chicago, US
169.148.175.24	AS56201 Zoho Corporation Pvt. Ltd,	`1.81ms` from Delhi, IN
81.148.233.184	AS2856 British Telecommunications PLC	`6.92ms` from Erith, GB
84.57.163.232	AS3209 Vodafone GmbH	`19.41ms` 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 -f3 166.111.5.35

traceroute to 166.111.5.35 (166.111.5.35): 64 hops max, 52 byte packets

3 [AS749] 21.252.32.1 1.691 ms

4 *

5 [AS4134] 36.103.191.213 0.468 ms

6 *

7 *

8 *

9 *

10 [AS4538] 101.4.113.234 20.79 ms

11 [AS4538] 202.112.38.70 19.748 ms

12 [AS4538] 118.229.4.69 21.033 ms

13 [AS4538] 118.229.4.74 21.87 ms

14 *

15 [AS4538] 118.229.8.6 22.448 ms

16 *

17 [AS4538] 166.111.5.35 21.44 ms

Measurement taken from

IPinfo ProbeNet in Zhongwei, CN

On February 7th 2026

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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