202.113.128.0/20

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain cernet.edu.cn
ASN AS4538
Parent Range 202.112.0.0/15
Registry APNIC
ID BJR-CERNET

WHOIS Details

inetnum:        202.112.0.0 - 202.113.255.255
netname:        BJR-CERNET
descr:          China Education and Research Network
descr:          Beijing Regional Network
country:        CN
org:            ORG-CEAR1-AP
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        origin AS4538
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-05-28T02:35:51Z
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

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:         [email protected]
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:         [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 202.113.128.0/20

Range ASN Company Num of IPs
202.112.0.0/15 AS4538 China Education and Research Network 131,072

Nearby Ranges

BGP prefixes that overlap with 202.113.0.0/16

Range ASN Company Num of IPs
202.112.0.0/15 AS4538 China Education and Research Network 131,072

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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

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

IP Address ASN Details
202.113.140.244 AS4538 China Education and Research Network Center 4.21ms from Beijing, CN
202.113.136.122 AS4538 China Education and Research Network Center 4.21ms from Beijing, CN
202.113.129.38 AS4538 China Education and Research Network Center 4.28ms from Beijing, CN
202.113.128.253 AS4538 China Education and Research Network Center 4.22ms from Beijing, CN
202.113.135.240 AS4538 China Education and Research Network Center 4.21ms from Beijing, CN
202.113.139.1 AS4538 China Education and Research Network Center 6.79ms from Tianjin, CN
202.113.137.99 AS4538 China Education and Research Network Center 4.18ms 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
41.65.40.52 AS36992 ETISALAT MISR 12.64ms from Cairo, EG
149.160.136.228 AS27198 Indiana University 6.81ms from Chicago, US
104.188.174.212 AS7018 AT&T Enterprises, LLC 7.45ms from Dallas, US
39.33.85.116 AS17557 Pakistan Telecommunication Company Limited 14.33ms from Islamabad, PK
204.199.165.20 AS3549 Level 3 Parent, LLC 0.32ms from Lima, PE
82.4.242.180 AS5089 Virgin Media Limited 4.48ms from London, GB
142.202.246.68 AS398079 Eminent, Inc 2.77ms from Los Angeles, US
178.140.103.132 AS42610 PJSC Rostelecom 1.03ms from Moscow, RU
91.229.6.52 AS9009 M247 Europe SRL 0.27ms from New York City, US
75.147.121.20 AS7922 Comcast Cable Communications, LLC 6.32ms from Philadelphia, US
160.153.95.100 AS26496 GoDaddy.com, LLC 1.11ms from Phoenix, US
131.120.103.4 AS668 United States Department of Defense (DoD) 3.78ms from San Jose, US
168.138.155.52 AS31898 Oracle Corporation 0.29ms from Sao Paulo, BR
174.27.159.228 AS209 CenturyLink Communications, LLC 10.84ms from Seattle, US
125.156.40.132 AS4766 Korea Telecom 5.59ms from Seoul, KR
211.33.2.212 AS9318 SK Broadband Co Ltd 5.33ms from Seoul, KR
213.141.71.228 AS16117 Gavle Energi AB 3.50ms from Stockholm, SE
114.72.174.228 AS4804 Microplex PTY LTD 5.67ms from Sydney, AU
136.61.66.20 AS16591 Google Fiber Inc. 7.05ms from Ashburn, US
20.253.43.52 AS8075 Microsoft Corporation 0.40ms from Ashburn, US
211.156.194.132 AS24430 Chinapost 5.51ms from Beijing, CN
16.146.47.244 AS16509 Amazon.com, Inc. 0.26ms from Boardman, US
68.227.189.244 AS22773 Cox Communications Inc. 8.73ms from Boston, US
89.244.89.196 AS8881 1&1 Versatel GmbH 4.67ms from Frankfurt am Main, DE
118.126.105.84 AS45090 Shenzhen Tencent Computer Systems Company Limited 2.23ms from Guangzhou, CN

Traceroute

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

$
traceroute -a -n -q1 -f3 202.113.139.1
traceroute to 202.113.139.1 (202.113.139.1): 64 hops max, 52 byte packets
3 [AS749] 11.62.82.166 0.846 ms
4 [AS749] 11.62.83.165 0.752 ms
5 *
9 *
10 *
11 *
12 *
14 [AS4538] 101.4.115.26 6.785 ms
15 *
16 [AS4538] 59.67.181.78 6.438 ms
17 [AS4538] 202.113.139.1 6.972 ms
Measurement taken from IPinfo ProbeNet in Tianjin, CN
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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