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:  2025-09-04T00:59:41Z
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
166.111.5.215	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

Read more

Pingable IPs

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

IP Address	ASN	Details
166.111.5.214	AS4538 China Education and Research Network Center	`2.23ms` 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
98.231.147.40	AS7922 Comcast Cable Communications, LLC	`9.27ms` from Chicago, US
52.231.154.184	AS8075 Microsoft Corporation	`0.26ms` from Dongnae, KR
87.175.105.184	AS3320 Deutsche Telekom AG	`10.15ms` from Frankfurt am Main, DE
207.61.47.216	AS577 Bell Canada	`1.20ms` from Montreal, CA
2.62.179.168	AS12389 PJSC Rostelecom	`7.25ms` from Novosibirsk, RU
91.16.150.24	AS3320 Deutsche Telekom AG	`1.40ms` from Nuernberg, DE
152.204.146.104	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`15.79ms` from Panama, PA
44.214.5.168	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
100.26.109.216	AS14618 Amazon.com, Inc.	`0.41ms` from Reston, US
73.118.170.120	AS7922 Comcast Cable Communications, LLC	`6.97ms` from Seattle, US
222.137.208.24	AS4837 CHINA UNICOM China169 Backbone	`2.81ms` from Zhengzhou, CN
115.69.163.104	AS55850 Mercury NZ Limited	`1.15ms` from Auckland, NZ
207.181.226.72	AS6079 RCN	`3.94ms` from Chicago, US
2.201.220.168	AS3209 Vodafone GmbH	`7.54ms` from Frankfurt am Main, DE
112.92.24.8	AS17816 China Unicom IP network China169 Guangdong province	`11.35ms` from Guangzhou, CN
70.164.119.168	AS22773 Cox Communications Inc.	`3.64ms` from Los Angeles, US
47.138.158.88	AS5650 Frontier Communications of America, Inc.	`7.72ms` from Los Angeles, US
112.205.41.88	AS9299 Philippine Long Distance Telephone Company	`1.21ms` from Manila, PH
212.210.5.24	AS3269 Telecom Italia S.p.A.	`4.16ms` from Milan, IT
198.16.180.232	AS1403 EBOX	`1.39ms` from Montreal, CA
95.100.252.24	AS20940 Akamai International B.V.	`0.75ms` from Paris, FR
44.223.201.168	AS14618 Amazon.com, Inc.	`0.09ms` from Reston, US
71.92.85.248	AS20115 Charter Communications LLC	`9.37ms` from San Jose, US
121.150.78.152	AS4766 Korea Telecom	`4.51ms` from Seoul, KR
82.81.209.24	AS8551 Bezeq International Ltd.	`7.21ms` from Tel Aviv, IL

Traceroute

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

traceroute -a -n -q1 -f2 166.111.5.236

traceroute to 166.111.5.236 (166.111.5.236): 64 hops max, 52 byte packets

2 [AS9808] 111.11.136.121 1.427 ms

3 *

4 *

5 [AS9808] 221.183.49.117 6.634 ms

6 *

7 *

8 [AS9808] 221.183.187.18 33.949 ms

9 *

10 [AS4538] 101.4.113.234 106.071 ms

11 [AS4538] 202.112.38.2 32.667 ms

12 [AS4538] 118.229.4.74 40.167 ms

13 *

14 [AS4538] 118.229.8.6 33.864 ms

15 *

16 [AS4538] 166.111.5.236 34.235 ms

Measurement taken from

IPinfo ProbeNet in Wuwei, CN

On November 14th 2025

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.

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