42.245.192.0/18

AS4538 · China Education and Research Network Center

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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

Overlapping Ranges

BGP prefixes that are contained by 42.245.192.0/18

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

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

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

IP Address	ASN	Details
42.245.201.79	AS4538 China Education and Research Network Center	`2.85ms` from Beijing, CN
42.245.210.81	AS4538 China Education and Research Network Center	`72.24ms` from Zhengzhou, CN
42.245.198.65	AS4538 China Education and Research Network Center	`3.33ms` from Beijing, CN
42.245.203.129	AS4538 China Education and Research Network Center	`3.99ms` from Beijing, CN
42.245.212.8	AS4538 China Education and Research Network Center	`2.13ms` from Shenzhen, CN
42.245.250.254	AS4538 China Education and Research Network Center	`7.97ms` from Shanghai, CN
42.245.205.70	AS4538 China Education and Research Network Center	`3.69ms` from Beijing, CN
42.245.209.129	AS4538 China Education and Research Network Center	`7.11ms` from Shanghai, CN
42.245.234.115	AS4538 China Education and Research Network Center	`1.88ms` from Guangzhou, CN
42.245.231.1	AS4538 China Education and Research Network Center	`0.88ms` from Qingdao, CN
42.245.236.10	AS4538 China Education and Research Network Center	`32.82ms` from Tianjin, CN
42.245.232.75	AS4538 China Education and Research Network Center	`0.88ms` from Guangzhou, CN
42.245.192.67	AS4538 China Education and Research Network Center	`41.15ms` from Beijing, CN
42.245.220.1	AS4538 China Education and Research Network Center	`3.21ms` from Beijing, CN
42.245.248.1	AS4538 China Education and Research Network Center	`8.14ms` from Shanghai, CN
42.245.252.18	AS4538 China Education and Research Network Center	`7.37ms` from Shanghai, 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
93.114.181.34	AS44854 Arend Brouwer	`0.35ms` from Amsterdam, NL
79.213.192.178	AS3320 Deutsche Telekom AG	`3.63ms` from Frankfurt am Main, DE
47.76.229.50	AS45102 Alibaba (US) Technology Co., Ltd.	`0.76ms` from Hong Kong, HK
112.73.180.162	AS9318 SK Broadband Co Ltd	`0.76ms` from Incheon, KR
69.140.21.242	AS7922 Comcast Cable Communications, LLC	`6.68ms` from Manassas, US
84.129.149.130	AS3320 Deutsche Telekom AG	`3.85ms` from Nuernberg, DE
112.227.14.114	AS4837 CHINA UNICOM China169 Backbone	`5.12ms` from Qingdao, CN
23.100.35.34	AS8075 Microsoft Corporation	`0.56ms` from San Jose, US
66.225.143.98	AS20161 TeraGo Networks Inc.	`3.95ms` from Seattle, US
1.71.32.98	AS4134 CHINANET-BACKBONE	`0.18ms` from Taiyuan, CN
79.133.243.2	AS21412 UAB Cgates	`0.54ms` from Vilnius, LT
205.208.30.114	AS160 The University of Chicago	`1.36ms` from Chicago, US
76.20.154.2	AS7922 Comcast Cable Communications, LLC	`11.90ms` from Flint, US
183.178.10.66	AS9269 Hong Kong Broadband Network Ltd.	`0.83ms` from Hong Kong, HK
70.114.204.114	AS11427 Charter Communications Inc	`9.71ms` from Houston, US
121.173.186.82	AS4766 Korea Telecom	`0.63ms` from Incheon, KR
58.232.61.66	AS9318 SK Broadband Co Ltd	`2.82ms` from Incheon, KR
136.48.83.210	AS16591 Google Fiber Inc.	`4.48ms` from Kansas City, US
2.47.15.98	AS30722 Fastweb SpA	`14.40ms` from Milan, IT
31.181.245.130	AS12389 PJSC Rostelecom	`17.25ms` from Moscow, RU
72.226.30.194	AS12271 Charter Communications Inc	`6.92ms` from New York City, US
62.148.46.66	AS13243 Tietoevry Norway AS	`2.81ms` from Oslo, NO
91.162.97.242	AS12322 Free SAS	`2.40ms` from Paris, FR
217.76.242.2	AS265627 NIDIX NETWORKS S.A. DE C.V.	`14.14ms` from Phoenix, US
178.17.0.2	AS50825 UVT Internet s.r.o.	`0.31ms` from Prague, CZ

Traceroute

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

traceroute -a -n -q1 -f6 -m9 42.245.221.31

traceroute to 42.245.221.31 (42.245.221.31): 9 hops max, 52 byte packets

6 [AS6453] 180.87.38.5 2.019 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Mumbai, IN

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.

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