121.49.4.0/24

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:          121.48.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2009-01-05T03:10:57Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 121.49.4.0/24

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

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Pingable IPs

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

IP Address	ASN	Details
121.49.4.1	AS4538 China Education and Research Network Center	`24.23ms` from Wuhan, 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
120.61.202.120	AS9829 National Internet Backbone	`13.43ms` from Bengaluru, IN
118.254.147.184	AS4134 CHINANET-BACKBONE	`3.41ms` from Chenzhou, CN
172.245.70.56	AS36352 HostPapa	`0.23ms` from Chicago, US
90.207.39.72	AS5607 Sky UK Limited	`4.43ms` from Erith, GB
103.36.206.168	AS23650 AS Number for CHINANET jiangsu province backbone	`0.11ms` from Huai'an, CN
165.120.197.56	AS2856 British Telecommunications PLC	`3.18ms` from London, GB
134.69.220.200	AS14486 Occidental College	`3.63ms` from Los Angeles, US
75.233.212.88	AS6167 Verizon Business	`16.75ms` from Los Angeles, US
182.107.194.120	AS4134 CHINANET-BACKBONE	`4.45ms` from Nanchang, CN
136.223.37.72	AS13536 FirstLight Fiber, Inc.	`5.68ms` from New York City, US
34.239.144.136	AS14618 Amazon.com, Inc.	`0.59ms` from Reston, US
31.191.95.56	AS1267 WIND TRE S.P.A.	`3.87ms` from Rome, IT
189.238.54.232	AS8151 UNINET	`16.85ms` from Santiago de Queretaro, MX
43.201.204.200	AS16509 Amazon.com, Inc.	`0.27ms` from Seoul, KR
118.9.250.136	AS4713 NTT DOCOMO BUSINESS,Inc.	`7.04ms` from Tokyo, JP
41.110.80.152	AS36947 Telecom Algeria	`15.01ms` from Algiers, DZ
94.248.211.200	AS43529 ViDaNet Cabletelevision Provider Ltd.	`9.29ms` from Budapest, HU
104.56.97.136	AS7018 AT&T Enterprises, LLC	`9.21ms` from Chicago, US
75.212.119.152	AS6167 Verizon Business	`16.39ms` from Dallas, US
70.9.1.248	AS6300 Fidium	`4.49ms` from Dallas, US
137.226.22.88	AS47610 RWTH Aachen University	`4.14ms` from Frankfurt am Main, DE
136.62.159.136	AS16591 Google Fiber Inc.	`5.37ms` from Houston, US
87.89.175.152	AS5410 Bouygues Telecom SA	`4.51ms` from Lyon, FR
188.208.28.184	AS34977 PROCONO S.A.	`9.93ms` from Madrid, ES
80.18.189.136	AS3269 Telecom Italia S.p.A.	`3.06ms` from Milan, IT

Traceroute

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

traceroute -a -n -q1 -m14 121.49.4.129

traceroute to 121.49.4.129 (121.49.4.129): 14 hops max, 52 byte packets

1 [AS141995] 109.123.229.12 0.933 ms

2 *

3 [AS6939] 184.104.199.209 53.34 ms

4 [] 123.255.91.118 49.322 ms

5 [AS4538] 101.4.114.181 89.909 ms

6 *

7 *

8 [AS4538] 101.4.112.66 100.548 ms

9 [AS4538] 101.4.112.29 127.037 ms

10 *

11 [AS4538] 202.202.217.106 127.944 ms

12 *

13 *

14 *

Measurement taken from

IPinfo ProbeNet in Tokyo, JP

On February 16th 2026

What are IP address ranges?

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