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
42.245.253.0/24	AS4538	CERNET New Technology Co., Ltd	256
42.245.247.0/24	AS4538	CERNET New Technology Co., Ltd	256
42.245.254.0/24	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
42.245.253.0/24	AS4538	CERNET New Technology Co., Ltd	256
42.245.247.0/24	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
42.245.212.27	AS4538 China Education and Research Network Center	`2.04ms` from Shenzhen, CN
42.245.210.81	AS4538 China Education and Research Network Center	`72.07ms` from Beijing, CN
42.245.198.65	AS4538 China Education and Research Network Center	`3.29ms` from Beijing, CN
42.245.201.79	AS4538 China Education and Research Network Center	`2.89ms` from Beijing, CN
42.245.236.10	AS4538 China Education and Research Network Center	`32.87ms` from Tianjin, CN
42.245.209.129	AS4538 China Education and Research Network Center	`7.09ms` from Shanghai, CN
42.245.192.67	AS4538 China Education and Research Network Center	`41.38ms` from Beijing, CN
42.245.252.18	AS4538 China Education and Research Network Center	`7.37ms` from Shanghai, CN
42.245.205.70	AS4538 China Education and Research Network Center	`3.65ms` from Beijing, CN
42.245.220.1	AS4538 China Education and Research Network Center	`3.19ms` from Beijing, CN
42.245.203.129	AS4538 China Education and Research Network Center	`3.84ms` from Beijing, CN
42.245.232.13	AS4538 China Education and Research Network Center	`0.88ms` from Guangzhou, CN
42.245.248.1	AS4538 China Education and Research Network Center	`8.07ms` from Shanghai, CN
42.245.250.254	AS4538 China Education and Research Network Center	`7.04ms` from Shanghai, CN
42.245.231.1	AS4538 China Education and Research Network Center	`0.86ms` from Qingdao, CN
42.245.234.118	AS4538 China Education and Research Network Center	`1.85ms` from Guangzhou, 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
174.170.124.114	AS7922 Comcast Cable Communications, LLC	`7.78ms` from Houston, US
99.127.238.178	AS7018 AT&T Enterprises, LLC	`3.19ms` from Kansas City, US
86.154.177.130	AS2856 British Telecommunications PLC	`3.20ms` from London, GB
212.36.154.50	AS8220 COLT Technology Services Group Limited	`0.66ms` from London, GB
87.127.69.34	AS8468 ENTANET International Limited	`4.88ms` from London, GB
97.163.63.114	AS6167 Verizon Business	`16.04ms` from Miami, US
87.13.73.114	AS3269 Telecom Italia S.p.A.	`6.00ms` from Milan, IT
63.142.186.226	AS16904 Arvig Enterprises Inc.	`0.21ms` from Minneapolis, US
101.143.31.162	AS17511 OPTAGE Inc.	`3.01ms` from Osaka, JP
73.98.153.98	AS7922 Comcast Cable Communications, LLC	`5.08ms` from Salt Lake City, US
187.216.13.66	AS8151 UNINET	`16.75ms` from Santiago de Queretaro, MX
88.203.233.98	AS42794 Ultracom Ltd.	`0.11ms` from Sofia, BG
187.108.5.2	AS28267 LANTEC COMUNICACAO MULTIMIDIA LTDA	`0.87ms` from São Paulo, BR
175.171.74.162	AS4837 CHINA UNICOM China169 Backbone	`8.19ms` from Tieling, CN
172.192.56.162	AS8075 Microsoft Corporation	`0.16ms` from Tokyo, JP
51.124.211.66	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
202.54.85.226	AS4755 TATA Communications formerly VSNL is Leading ISP	`0.46ms` from Bengaluru, IN
87.169.176.130	AS3320 Deutsche Telekom AG	`5.60ms` from Berlin, DE
91.25.91.210	AS3320 Deutsche Telekom AG	`0.85ms` from Berlin, DE
87.242.4.34	AS35311 PR-TELECOM Zrt.	`5.20ms` from Budapest, HU
70.89.2.226	AS7922 Comcast Cable Communications, LLC	`4.45ms` from Chicago, US
24.204.62.162	AS32505 Conterra	`3.03ms` from Dallas, US
84.60.40.18	AS3209 Vodafone GmbH	`4.95ms` from Duesseldorf, DE
198.166.198.130	AS852 TELUS Communications Inc.	`0.54ms` from Edmonton, CA
79.213.192.178	AS3320 Deutsche Telekom AG	`3.59ms` from Frankfurt am Main, DE

Traceroute

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

traceroute -a -n -q1 -f2 -m6 42.245.221.102

traceroute to 42.245.221.102 (42.245.221.102): 6 hops max, 52 byte packets

2 [AS3257] 154.14.160.13 6.85 ms

3 [AS3257] 141.136.110.26 0.887 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Amsterdam, NL

On March 29th 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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