121.195.180.0/22

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	121.194.0.0/15
Registry	APNIC
ID	BJR-CERNET

WHOIS Details

inetnum:        121.194.0.0 - 121.195.255.255
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:        origin AS4538
remarks:        confederation
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:22Z
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

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

route:          121.194.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 121.195.180.0/22

Range	ASN	Company	Num of IPs
121.194.0.0/15	AS4538	China Education and Research Network	131,072

Nearby Ranges

BGP prefixes that overlap with 121.195.0.0/16

Range	ASN	Company	Num of IPs
121.194.0.0/15	AS4538	China Education and Research Network	131,072

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
50.206.107.150	AS7922 Comcast Cable Communications, LLC	`1.35ms` from Atlanta, US
20.84.193.6	AS8075 Microsoft Corporation	`0.18ms` from Des Moines, US
211.66.81.70	AS4538 China Education and Research Network Center	`10.28ms` from Heyuan, CN
72.130.115.86	AS20001 Charter Communications Inc	`10.21ms` from Honolulu, US
203.197.91.22	AS4755 TATA Communications formerly VSNL is Leading ISP	`0.60ms` from Lohogaon, IN
173.31.34.70	AS30036 Mediacom Communications Corp	`15.99ms` from Minneapolis, US
35.196.121.166	AS396982 Google LLC	`0.14ms` from Moncks Corner, US
37.21.255.230	AS12389 PJSC Rostelecom	`5.22ms` from Novosibirsk, RU
220.181.114.38	AS23724 IDC, China Telecommunications Corporation	`2.56ms` from Tianjin, CN
99.215.55.54	AS812 Rogers Communications Canada Inc.	`9.90ms` from Toronto, CA
87.210.189.22	AS50266 Odido Netherlands B.V.	`4.03ms` from Amsterdam, NL
184.82.105.182	AS133481 AIS Fibre	`2.06ms` from Bangkok, TH
101.69.148.70	AS4837 CHINA UNICOM China169 Backbone	`7.57ms` from Hangzhou, CN
93.120.208.102	AS12389 PJSC Rostelecom	`6.14ms` from Kazan, RU
213.52.132.86	AS15830 Equinix (EMEA) Acquisition Enterprises B.V.	`0.37ms` from London, GB
158.46.93.166	AS39927 E-Light-Telecom Ltd.	`7.40ms` from Novosibirsk, RU
5.49.239.230	AS5410 Bouygues Telecom SA	`9.40ms` from Paris, FR
24.10.0.214	AS7922 Comcast Cable Communications, LLC	`9.55ms` from Santa Clara, US
112.178.98.70	AS4766 Korea Telecom	`5.67ms` from Seoul, KR
175.239.128.86	AS4766 Korea Telecom	`5.44ms` from Seoul, KR
210.115.143.150	AS7559 donga.com	`0.93ms` from Seoul, KR
1.177.240.230	AS9845 LG HelloVision Corp.	`13.67ms` from Seoul, KR
115.209.241.198	AS4134 CHINANET-BACKBONE	`10.97ms` from Shanghai, CN
51.21.212.214	AS16509 Amazon.com, Inc.	`0.14ms` from Stockholm, SE
164.52.68.54	AS63199 CDS Global Cloud Co., Ltd	`0.31ms` from Taipei, TW

Traceroute

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

traceroute -a -n -q1 -f3 -m12 121.195.182.175

traceroute to 121.195.182.175 (121.195.182.175): 12 hops max, 52 byte packets

3 [AS58453] 223.120.6.17 16.031 ms

4 [AS58453] 223.120.3.86 166.896 ms

5 [AS58453] 223.119.81.94 167.665 ms

6 *

7 [AS4538] 101.4.114.169 195.33 ms

8 *

9 [AS4538] 101.4.113.201 199.726 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Salt Lake City, US

On December 14th 2025

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