202.38.140.0/23

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain cernet.edu.cn
ASN AS4538
Registry APNIC
ID BJR-CERNET

WHOIS Details

inetnum:        202.38.140.0 - 202.38.141.255
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:         ASSIGNED PORTABLE
remarks:        origin AS4538
remarks:        old STU-CN returned by 19960101
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:12Z
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

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

Nearby Ranges

BGP prefixes that overlap with 202.38.0.0/16

Range ASN Company Num of IPs
202.38.192.0/18 AS4538 South China University of Technology 16,384
202.38.64.0/19 AS4538 The University of Science and Technology of China 8,192
202.38.184.0/21 AS4538 China Education and Research Network 2,048
202.38.8.0/21 AS4808 China Institute of Atomic Energy 2,048
202.38.180.0/22 AS56268 Northeast Dataa Network Pvt Ltd 1,024
202.38.128.0/23 AS7497 Institute of High Energy Physics 512
202.38.132.0/23 AS4812 SAIC VOLKSWAGEN AUTOMOTIVE CO.LTD. 512
202.38.152.0/23 AS17964 Beijing Fouth Dimension Telecom Co,Ltd 512
202.38.4.0/23 AS212141 IBKR Financial Services AG 512
202.38.134.0/24 AS4812 SAIC VOLKSWAGEN AUTOMOTIVE CO.LTD. 256
202.38.139.0/24 AS56072 301 Fairfield Road 256
202.38.157.0/24 AS23921 INGDIRECT, Sydney 256

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

Pingable IPs

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

IP Address ASN Details
202.38.140.57 AS4538 China Education and Research Network Center 5.66ms 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
195.211.190.7 AS25198 ZetServers 0.20ms from Frankfurt am Main, DE
116.29.102.151 AS4134 CHINANET-BACKBONE 4.93ms from Guangzhou, CN
70.113.129.151 AS11427 Charter Communications Inc 9.84ms from Houston, US
175.139.162.87 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 2.40ms from Kuala Lumpur, MY
86.168.51.183 AS2856 British Telecommunications PLC 4.47ms from London, GB
5.70.118.55 AS5607 Sky UK Limited 12.92ms from London, GB
76.153.111.23 AS7922 Comcast Cable Communications, LLC 5.51ms from Miami, US
175.195.6.7 AS4766 Korea Telecom 1.69ms from Seoul, KR
222.114.159.103 AS4766 Korea Telecom 3.12ms from Seoul, KR
20.196.212.215 AS8075 Microsoft Corporation 0.29ms from Seoul, KR
121.224.2.151 AS4134 CHINANET-BACKBONE 4.01ms from Shanghai, CN
52.74.191.71 AS16509 Amazon.com, Inc. 0.13ms from Singapore, SG
20.247.242.199 AS8075 Microsoft Corporation 0.51ms from Singapore, SG
96.6.148.23 AS32787 Akamai Technologies, Inc. 0.15ms from Zuerich, CH
193.67.79.39 AS702 Verizon Business 0.83ms from Amsterdam, NL
66.44.54.199 AS6079 RCN 5.32ms from Ashburn, US
75.34.95.119 AS7018 AT&T Enterprises, LLC 6.72ms from Atlanta, US
98.230.13.87 AS7922 Comcast Cable Communications, LLC 8.84ms from Atlanta, US
34.170.185.39 AS396982 Google LLC 0.11ms from Council Bluffs, US
2.207.91.183 AS3209 Vodafone GmbH 6.61ms from Duesseldorf, DE
14.17.112.55 AS4134 CHINANET-BACKBONE 2.77ms from Guangzhou, CN
81.155.122.55 AS2856 British Telecommunications PLC 5.68ms from London, GB
52.26.213.167 AS16509 Amazon.com, Inc. 4.48ms from Portland, US
177.70.152.199 AS262813 Superimagem Tecnologia em Eletronica Ltda 5.93ms from Rio de Janeiro, BR
119.67.172.215 AS17858 LG POWERCOMM 1.87ms from Seoul, KR

Traceroute

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

$
traceroute -a -n -q1 -m10 202.38.141.13
traceroute to 202.38.141.13 (202.38.141.13): 10 hops max, 52 byte packets
4 *
5 *
6 [] 123.255.91.118 47.594 ms
7 [AS4538] 101.4.114.181 80.895 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Chuncheon, KR
On

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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