42.245.203.0/24

AS4538 · China Education and Research Network Center

Need more data or want to access it via API or data downloads? Sign up to get free access

Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Registry	APNIC
ID	JSBD-CN

WHOIS Details

inetnum:        42.245.192.0 - 42.245.207.255
netname:        JSBD-CN
descr:          ~{H|6{PB<<Ju~}
descr:          CERNET New Technology Co., Ltd
descr:          Beijing 100084, China
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ASSIGNED NON-PORTABLE
remarks:        conn-id NJ003126
mnt-by:         MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2022-05-30T03:21:25Z
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:          42.245.192.0/18
descr:          CERNET Newtech
origin:         AS133111
mnt-by:         MAINT-CERNET-AP
last-modified:  2017-03-14T04:00:08Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 42.245.0.0/16

Range	ASN	Company	Num of IPs
42.245.232.0/22	AS4538	CERNET New Technology Co., Ltd	1,024
42.245.247.0/24	AS4538	CERNET New Technology Co., Ltd	256
42.245.253.0/24	AS4538	CERNET New Technology Co., Ltd	256
42.245.254.0/24	AS4538	CERNET New Technology Co., Ltd	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

Read more

Pingable IPs

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

IP Address	ASN	Details
42.245.203.129	AS4538 China Education and Research Network Center	`3.99ms` 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
69.48.30.72	AS7029 Windstream Communications LLC	`8.30ms` from Chicago, US
174.16.184.120	AS209 CenturyLink Communications, LLC	`1.68ms` from Denver, US
90.53.228.168	AS3215 Orange S.A.	`8.13ms` from Frankfurt am Main, DE
91.20.210.248	AS3320 Deutsche Telekom AG	`9.04ms` from Frankfurt am Main, DE
223.33.115.88	AS9644 SK Telecom	`2.35ms` from Incheon, KR
13.40.63.8	AS16509 Amazon.com, Inc.	`0.51ms` from London, GB
119.93.147.200	AS9299 Philippine Long Distance Telephone Company	`1.24ms` from Manila, PH
136.152.228.168	AS25 University of California at Berkeley	`2.08ms` from San Jose, US
186.107.65.216	AS7418 TELEFÓNICA CHILE S.A.	`4.31ms` from Santiago, CL
43.200.249.152	AS16509 Amazon.com, Inc.	`0.14ms` from Seoul, KR
97.151.216.200	AS6167 Verizon Business	`11.90ms` from Ashburn, US
80.139.252.88	AS3320 Deutsche Telekom AG	`5.48ms` from Berlin, DE
20.234.123.152	AS8075 Microsoft Corporation	`0.17ms` from Dublin, IE
116.62.82.104	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.04ms` from Hangzhou, CN
223.194.227.120	AS55628 Incheon Free Economic Zone	`0.85ms` from Incheon, KR
185.231.225.8	AS206668 Bayram Coskun	`0.34ms` from Istanbul, TR
82.151.131.200	AS8685 Doruk Iletisim ve Otomasyon Sanayi ve Ticaret A.S.	`2.73ms` from Istanbul, TR
178.208.216.152	AS8301 Gibtelecom Ltd.	`10.92ms` from Madrid, ES
210.171.192.216	AS58788 Chiroro-Net Co.,Ltd.	`3.55ms` from Osaka, JP
101.226.161.216	AS4811 China Telecom (Group)	`2.51ms` from Shanghai, CN
85.198.202.184	AS30851 Sileman Sp. z o.o.	`3.96ms` from Wrocław, PL
51.124.222.72	AS8075 Microsoft Corporation	`0.25ms` from Amsterdam, NL
34.145.247.88	AS396982 Google LLC	`0.14ms` from Ashburn, US
79.129.184.72	AS6799 Ote SA (Hellenic Telecommunications Organisation)	`5.03ms` from Athens, GR
190.65.119.40	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`7.69ms` from Bogota, CO

Traceroute

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

traceroute -a -n -q1 -m21 42.245.203.99

traceroute to 42.245.203.99 (42.245.203.99): 21 hops max, 52 byte packets

1 [AS31898] 140.91.224.45 0.079 ms

2 [AS4826] 49.255.115.254 38.671 ms

3 [AS4826] 49.255.115.253 5.156 ms

4 [AS4826] 114.31.196.62 83.829 ms

5 [] 103.1.77.86 84.398 ms

6 [] 103.1.76.157 84.325 ms

7 [] 103.1.76.169 86.426 ms

8 [] 103.1.77.97 83.798 ms

9 [AS4826] 114.31.206.51 86.179 ms

10 *

11 [AS6939] 184.104.199.181 115.086 ms

12 *

13 [AS4538] 101.4.114.181 147.808 ms

14 *

15 [AS4538] 101.4.117.81 149.15 ms

16 [AS4538] 219.224.102.229 147.989 ms

17 *

18 [AS4538] 58.205.176.2 148.281 ms

19 *

20 *

21 *

Measurement taken from

IPinfo ProbeNet in Melbourne, AU

On March 20th 2026

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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales