202.199.64.0/20

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	202.192.0.0/13
Registry	APNIC
ID	CERNET-CN

WHOIS Details

inetnum:        202.192.0.0 - 202.199.255.255
netname:        CERNET-CN
descr:          China Education and Research Network
descr:          SY Region
descr:          China Education and Research Network Center
descr:          Tsinghua University
descr:          Beijing, 100084
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        service provider
remarks:        [email protected] 960130
mnt-by:         APNIC-HM
mnt-irt:        IRT-CERNET-AP
last-modified:  2021-10-30T08:29:34Z
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
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

Overlapping Ranges

BGP prefixes that contain 202.199.64.0/20

Range	ASN	Company	Num of IPs
202.192.0.0/13	AS4538	China Education and Research Network	524,288

Nearby Ranges

BGP prefixes that overlap with 202.199.0.0/16

Range	ASN	Company	Num of IPs
202.192.0.0/13	AS4538	China Education and Research Network	524,288
202.199.240.0/21	AS4538	Anshan Institute of Iron and Steel Technology	2,048
202.199.248.0/21	AS4538	Anshan Normal College	2,048

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

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

IP Address	ASN	Details
202.199.77.10	AS4538 China Education and Research Network Center	`8.16ms` from Dalian, CN
202.199.64.10	AS4538 China Education and Research Network Center	`14.01ms` from Beijing, CN
202.199.69.243	AS4538 China Education and Research Network Center	`15.23ms` 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
52.39.95.244	AS16509 Amazon.com, Inc.	`0.18ms` from Boardman, US
14.139.254.148	AS55824 NKN Core Network	`1.41ms` from Delhi, IN
121.204.129.196	AS133774 Fuzhou	`1.77ms` from Fuzhou, CN
210.210.186.164	AS4787 PT Cyberindo Aditama	`0.59ms` from Jakarta, ID
210.48.135.52	AS10001 Mics Network Corporation	`4.81ms` from Osaka, JP
122.251.139.228	AS18077 Yamaguchi Cable Vision Co.,Ltd	`12.42ms` from Osaka, JP
124.18.161.52	AS18126 Chubu Telecommunications Company, Inc.	`7.10ms` from Osaka, JP
15.248.17.180	AS16509 Amazon.com, Inc.	`0.38ms` from Paris, FR
118.190.87.100	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.21ms` from Qingdao, CN
35.71.117.132	AS16509 Amazon.com, Inc.	`0.10ms` from San Jose, US
50.125.50.100	AS20055 Wholesail networks LLC	`1.62ms` from Seattle, US
52.78.190.20	AS16509 Amazon.com, Inc.	`0.21ms` from Seoul, KR
112.158.11.4	AS17858 LG POWERCOMM	`1.97ms` from Seoul, KR
123.100.173.244	AS38673 Korea Cable TV Kwangju Broadcasting	`6.07ms` from Seoul, KR
110.141.83.116	AS1221 Telstra Limited	`6.25ms` from Sydney, AU
159.223.14.244	AS14061 DigitalOcean, LLC	`0.22ms` from Amsterdam, NL
142.173.208.52	AS20115 Charter Communications LLC	`0.84ms` from Ashburn, US
5.250.217.68	AS44725 Sinam LLC	`15.13ms` from Baku, AZ
123.52.1.4	AS137687 Luoyang, Henan Province, P.R.China.	`0.55ms` from Beijing, CN
62.10.89.164	AS8070 Microsoft Corporation	`0.65ms` from Boydton, US
121.214.69.196	AS1221 Telstra Limited	`2.77ms` from Brisbane, AU
96.9.246.164	AS20278 Nexeon Technologies, Inc.	`0.15ms` from Buffalo, US
84.18.234.4	AS42611 Full Fibre Limited	`6.17ms` from London, GB
221.103.42.4	AS17676 SoftBank Corp.	`4.28ms` from Osaka, JP
201.138.83.68	AS8151 UNINET	`9.35ms` from Santiago de Queretaro, MX

Traceroute

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

traceroute -a -n -q1 -m17 202.199.72.171

traceroute to 202.199.72.171 (202.199.72.171): 17 hops max, 52 byte packets

1 [AS398478] 38.6.224.94 13.877 ms

2 *

3 [] 203.144.97.117 2.005 ms

4 *

5 [] 69.194.169.194 1.765 ms

6 *

7 [] 59.43.182.61 38.251 ms

8 *

9 *

10 *

11 *

12 [AS4538] 101.4.117.225 95.596 ms

13 [AS4538] 101.4.114.233 96.026 ms

14 [AS4538] 101.4.113.138 97.758 ms

15 *

16 *

17 *

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On December 20th 2025

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