183.172.128.0/17

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	183.172.0.0/14
Registry	APNIC
ID	BJR-CERNET

WHOIS Details

inetnum:        183.172.0.0 - 183.175.255.255
netname:        BJR-CERNET
descr:          China Education and Research Network
descr:          Beijing Regional Network
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        NS2.NET.EDU.CN
remarks:        DNS.EDU.CN
remarks:        DNS2.EDU.CN
remarks:        origin AS4538
remarks:        confederation
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:13Z
source:         APNIC

irt:            IRT-CERNET-AP
address:        Network Center,
address:        FIT-3-220, 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:        abuse@cernet.edu.cn was validated on 2026-03-05
mnt-by:         MAINT-CERNET-AP
last-modified:  2026-03-05T06:39:56Z
source:         APNIC

role:           ABUSE CERNETAP
country:        ZZ
address:        Network Center,
address:        FIT-3-220, 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 2026-03-05
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2026-03-05T06:40:20Z
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

route:          183.172.0.0/14
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-11-25T07:36:58Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 183.172.128.0/17

Range	ASN	Company	Num of IPs
183.172.0.0/14	AS4538	China Education and Research Network	262,144

Nearby Ranges

BGP prefixes that overlap with 183.172.0.0/16

Range	ASN	Company	Num of IPs
183.172.0.0/14	AS4538	China Education and Research Network	262,144

Hosted domains

There are no domains currently hosted on this ASN.

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

3,944 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
183.172.206.205	AS4538 China Education and Research Network Center	`6.08ms` from Beijing, CN
183.172.129.0	AS4538 China Education and Research Network Center	`6.09ms` from Beijing, CN
183.172.130.170	AS4538 China Education and Research Network Center	`5.63ms` from Beijing, CN
183.172.164.178	AS4538 China Education and Research Network Center	`5.06ms` from Beijing, CN
183.172.216.50	AS4538 China Education and Research Network Center	`2.38ms` from Beijing, CN
183.172.178.183	AS4538 China Education and Research Network Center	`6.51ms` from Beijing, CN
183.172.169.162	AS4538 China Education and Research Network Center	`6.49ms` from Beijing, CN
183.172.150.41	AS4538 China Education and Research Network Center	`5.96ms` from Beijing, CN
183.172.191.188	AS4538 China Education and Research Network Center	`5.66ms` from Tianjin, CN
183.172.215.118	AS4538 China Education and Research Network Center	`6.62ms` from Beijing, CN
183.172.201.16	AS4538 China Education and Research Network Center	`5.58ms` from Beijing, CN
183.172.193.244	AS4538 China Education and Research Network Center	`5.49ms` from Beijing, CN
183.172.133.45	AS4538 China Education and Research Network Center	`6.15ms` from Beijing, CN
183.172.203.250	AS4538 China Education and Research Network Center	`5.04ms` from Beijing, CN
183.172.211.34	AS4538 China Education and Research Network Center	`5.43ms` from Beijing, CN
183.172.156.240	AS4538 China Education and Research Network Center	`5.01ms` from Beijing, CN
183.172.202.141	AS4538 China Education and Research Network Center	`6.03ms` from Beijing, CN
183.172.138.95	AS4538 China Education and Research Network Center	`5.22ms` from Beijing, CN
183.172.176.50	AS4538 China Education and Research Network Center	`2.15ms` from Beijing, CN
183.172.207.203	AS4538 China Education and Research Network Center	`5.85ms` from Beijing, CN
183.172.139.177	AS4538 China Education and Research Network Center	`5.50ms` from Tianjin, CN
183.172.137.110	AS4538 China Education and Research Network Center	`5.47ms` from Beijing, CN
183.172.145.86	AS4538 China Education and Research Network Center	`4.48ms` from Beijing, CN
183.172.195.208	AS4538 China Education and Research Network Center	`5.52ms` from Beijing, CN
183.172.217.115	AS4538 China Education and Research Network Center	`5.04ms` 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
194.171.34.241	AS1103 SURF B.V.	`2.72ms` from Amsterdam, NL
212.178.118.97	AS33915 Vodafone Libertel B.V.	`4.55ms` from Amsterdam, NL
184.60.178.33	AS4181 TDS TELECOM	`10.83ms` from Atlanta, US
12.197.110.161	AS7018 AT&T Enterprises, LLC	`3.26ms` from Atlanta, US
124.205.140.1	AS4808 China Unicom Beijing Province Network	`3.20ms` from Beijing, CN
123.119.192.1	AS4808 China Unicom Beijing Province Network	`3.38ms` from Beijing, CN
181.56.232.1	AS10620 Telmex Colombia S.A.	`0.90ms` from Bogota, CO
190.96.168.1	AS22368 TELEBUCARAMANGA S.A. E.S.P.	`8.01ms` from Bogota, CO
49.177.8.1	AS4804 Microplex PTY LTD	`1.24ms` from Brisbane, AU
145.236.10.129	AS5483 Magyar Telekom Plc.	`8.41ms` from Budapest, HU
118.249.217.1	AS4134 CHINANET BACKBONE	`1.82ms` from Changsha, CN
66.26.216.17	AS11426 Charter Communications Inc	`6.57ms` from Charlotte, US
221.7.125.17	AS4837 CHINA UNICOM China169 Backbone	`5.08ms` from Chongqing, CN
172.3.108.97	AS7018 AT&T Enterprises, LLC	`1.93ms` from Dallas, US
116.204.152.193	AS149298 Udayan Online Ltd.	`0.59ms` from Dhaka, BD
178.201.32.129	AS3209 Vodafone GmbH	`1.75ms` from Duesseldorf, DE
70.64.180.1	AS6327 Shaw Communications	`7.39ms` from Edmonton, CA
205.206.218.1	AS852 TELUS Communications Inc.	`9.60ms` from Edmonton, CA
68.42.126.49	AS7922 Comcast Cable Communications, LLC	`12.28ms` from Flint, US
117.30.254.129	AS4134 CHINANET BACKBONE	`5.95ms` from Fuzhou, CN
171.245.254.225	AS7552 Viettel Group	`1.11ms` from Ho Chi Minh City, VN
124.48.19.129	AS17858 LG POWERCOMM	`1.76ms` from Incheon, KR
78.174.232.1	AS9121 Turk Telekomunikasyon Anonim Sirketi	`19.99ms` from Istanbul, TR
69.15.56.225	AS8075 Microsoft Corporation	`0.68ms` from Jakarta, ID
65.158.202.65	AS209 CenturyLink Communications, LLC	`1.92ms` from Las Vegas, US

Traceroute

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

traceroute -a -n -q1 -f4 183.172.193.243

traceroute to 183.172.193.243 (183.172.193.243): 64 hops max, 52 byte packets

4 [AS6939] 184.104.196.248 27.45 ms

5 [AS6939] 184.105.213.89 30.662 ms

6 *

7 *

8 *

9 *

10 [] 123.255.91.118 197.98 ms

11 *

12 *

13 *

14 [AS4538] 101.4.115.249 232.031 ms

15 *

16 [AS4538] 202.112.38.142 236.248 ms

17 [AS4538] 118.229.4.74 237.773 ms

18 *

19 *

20 *

21 *

22 [AS4538] 183.172.193.243 383.615 ms

Measurement taken from

IPinfo ProbeNet in Halifax, CA

On April 24th 2026

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