121.48.176.0/20

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 121.48.176.0/20

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 121.48.0.0/16

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

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Useful for Cybersecurity

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Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
83.242.59.196	AS41998 NetCom BW GmbH	`5.33ms` from Frankfurt am Main, DE
36.4.203.52	AS4134 CHINANET-BACKBONE	`12.26ms` from Huai'an, CN
58.235.212.180	AS9318 SK Broadband Co Ltd	`7.01ms` from Incheon, KR
94.60.13.148	AS12353 Vodafone Portugal	`6.88ms` from Lisbon, PT
24.231.124.196	AS29866 OPTICALTEL	`1.10ms` from Miami, US
178.186.233.148	AS12389 PJSC Rostelecom	`5.70ms` from Novosibirsk, RU
65.35.43.132	AS33363 Charter Communications, Inc	`10.00ms` from Orlando, US
88.164.238.100	AS12322 Free SAS	`2.84ms` from Paris, FR
43.135.141.196	AS132203 Tencent Building, Kejizhongyi Avenue	`0.27ms` from San Jose, US
49.22.111.148	AS4766 Korea Telecom	`1.63ms` from Seoul, KR
213.217.217.68	AS12709 Melita Limited	`6.34ms` from Swieqi, MT
81.8.176.100	AS25176 AC-Net AB	`7.92ms` from Umea, SE
83.219.88.100	AS15879 KPN Internedservices	`1.18ms` from Amsterdam, NL
185.134.67.4	AS5405 Inter.link GmbH	`0.14ms` from Ashburn, US
44.253.100.228	AS16509 Amazon.com, Inc.	`0.19ms` from Boardman, US
87.67.20.116	AS5432 Proximus NV	`3.70ms` from Brussels, BE
124.43.121.132	AS9329 Sri Lanka Telecom Internet	`3.22ms` from Colombo, LK
68.183.78.196	AS14061 DigitalOcean, LLC	`0.25ms` from Frankfurt am Main, DE
45.90.121.4	AS51167 Contabo GmbH	`2.02ms` from Frankfurt am Main, DE
114.55.65.196	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.55ms` from Hangzhou, CN
122.159.208.116	AS4837 CHINA UNICOM China169 Backbone	`2.13ms` from Harbin, CN
108.222.61.4	AS7018 AT&T Enterprises, LLC	`5.18ms` from Houston, US
118.217.82.148	AS9318 SK Broadband Co Ltd	`2.96ms` from Incheon, KR
90.202.24.84	AS5607 Sky UK Limited	`0.90ms` from London, GB
51.11.175.228	AS8075 Microsoft Corporation	`0.27ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -f2 -m16 121.48.177.195

traceroute to 121.48.177.195 (121.48.177.195): 16 hops max, 52 byte packets

2 [AS749] 11.73.1.121 2.315 ms

3 [AS749] 11.141.77.26 0.335 ms

4 [AS45102] 116.251.105.142 0.322 ms

5 [AS45102] 116.251.107.105 8.546 ms

6 *

7 [AS4538] 101.4.130.61 9.504 ms

8 *

9 [AS4538] 101.4.112.14 26.37 ms

10 [AS4538] 101.4.112.49 27.299 ms

11 *

12 [AS4538] 101.4.112.194 45.291 ms

13 [AS4538] 202.115.255.213 44.388 ms

14 *

15 *

16 *

Measurement taken from

IPinfo ProbeNet in Hohhot, CN

On January 19th 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.

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