121.49.0.0/22

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	121.48.0.0/15
Registry	APNIC
ID	CDR-CERNET

WHOIS Details

inetnum:        121.48.0.0 - 121.49.255.255
netname:        CDR-CERNET
descr:          China Education and Research Network
descr:          Chengdu Regional Network
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        origin AS4538
remarks:        confederation
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:00Z
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:  2025-11-18T00:26:28Z
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

route:          121.49.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 121.49.0.0/22

Range	ASN	Company	Num of IPs
121.48.0.0/15	AS4538	China Education and Research Network	131,072

Nearby Ranges

BGP prefixes that overlap with 121.49.0.0/16

Range	ASN	Company	Num of IPs
121.48.0.0/15	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

Read more

Pingable IPs

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

IP Address	ASN	Details
121.49.0.252	AS4538 China Education and Research Network Center	`26.71ms` from Wuhan, CN
121.49.2.254	AS4538 China Education and Research Network Center	`21.48ms` from Wuhan, CN
121.49.3.254	AS4538 China Education and Research Network Center	`40.56ms` 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
150.239.73.230	AS36351 IBM Cloud	`0.50ms` from Ashburn, US
184.19.201.38	AS5650 Frontier Communications of America, Inc.	`7.63ms` from Ashburn, US
173.163.131.150	AS7922 Comcast Cable Communications, LLC	`18.73ms` from Ashburn, US
116.132.221.38	AS4837 CHINA UNICOM China169 Backbone	`15.79ms` from Beijing, CN
66.31.25.150	AS7922 Comcast Cable Communications, LLC	`6.35ms` from Boston, US
75.109.38.70	AS19108 Optimum	`16.51ms` from Chicago, US
169.47.96.150	AS36351 IBM Cloud	`1.02ms` from Dallas, US
117.255.111.54	AS9829 National Internet Backbone	`7.49ms` from Delhi, IN
54.229.66.118	AS16509 Amazon.com, Inc.	`0.21ms` from Dublin, IE
18.192.201.166	AS16509 Amazon.com, Inc.	`0.16ms` from Frankfurt am Main, DE
140.82.39.246	AS20473 The Constant Company, LLC	`0.13ms` from Frankfurt am Main, DE
112.33.52.230	AS141425 China Mobile Group Guangdong communications corporation	`4.48ms` from Guangzhou, CN
58.253.176.230	AS17816 China Unicom IP network China169 Guangdong province	`5.42ms` from Guangzhou, CN
45.199.109.134	AS134548 DXTL Tseung Kwan O Service	`0.79ms` from Hong Kong, HK
212.140.115.150	AS2856 British Telecommunications PLC	`1.47ms` from London, GB
160.202.84.86	AS46261 QuickPacket, LLC	`0.72ms` from Los Angeles, US
121.239.227.70	AS4134 CHINANET-BACKBONE	`5.58ms` from Nanjing, CN
120.27.113.102	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.10ms` from Qingdao, CN
187.218.227.70	AS8151 UNINET	`0.82ms` from Santiago de Queretaro, MX
189.120.180.198	AS28573 Claro NXT Telecomunicacoes Ltda	`5.21ms` from Sao Paulo, BR
96.48.101.102	AS6327 Shaw Communications	`7.75ms` from Seattle, US
212.244.210.86	AS5617 Orange Polska Spolka Akcyjna	`10.18ms` from Warsaw, PL
47.212.123.150	AS19108 Optimum	`18.85ms` from Ashburn, US
190.49.86.102	AS22927 Telefonica de Argentina	`1.91ms` from Buenos Aires, AR
20.107.147.118	AS8075 Microsoft Corporation	`0.13ms` from Dublin, IE

Traceroute

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

traceroute -a -n -q1 121.49.2.253

traceroute to 121.49.2.253 (121.49.2.253): 64 hops max, 52 byte packets

1 [AS50293] 193.39.195.45 0.822 ms

2 *

3 *

4 *

5 *

6 [] 123.255.91.118 319.13 ms

7 [AS4538] 101.4.114.181 318.69 ms

8 *

9 *

10 [AS4538] 101.4.112.66 334.23 ms

11 [AS4538] 101.4.112.29 351.125 ms

12 *

13 [AS4538] 202.202.217.106 347.117 ms

14 [AS4538] 121.49.2.253 362.182 ms

Measurement taken from

IPinfo ProbeNet in Lisbon, PT

On November 22nd 2025

What are IP address ranges?

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