1.51.160.0/21

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	1.51.0.0/16
Registry	APNIC
ID	NJR-CERNET

WHOIS Details

inetnum:        1.51.0.0 - 1.51.255.255
netname:        NJR-CERNET
descr:          China Education and Research Network
descr:          Nanjing 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:  2020-09-03T09:16:03Z
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:          1.51.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2010-07-15T07:00:01Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 1.51.160.0/21

Range	ASN	Company	Num of IPs
1.51.0.0/16	AS4538	China Education and Research Network	65,536

Nearby Ranges

BGP prefixes that overlap with 1.51.0.0/16

Range	ASN	Company	Num of IPs
1.51.0.0/16	AS4538	China Education and Research Network	65,536

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
154.243.211.5	AS36947 Telecom Algeria	`10.35ms` from Algiers, DZ
51.222.13.197	AS16276 OVH SAS	`0.11ms` from Beauharnois, CA
84.188.92.69	AS3320 Deutsche Telekom AG	`4.03ms` from Frankfurt am Main, DE
61.174.27.181	AS4134 CHINANET-BACKBONE	`7.22ms` from Hangzhou, CN
49.166.70.53	AS17858 LG POWERCOMM	`7.31ms` from Incheon, KR
213.4.83.133	AS3352 TELEFONICA DE ESPANA S.A.U.	`1.45ms` from Madrid, ES
47.12.58.101	AS20115 Charter Communications LLC	`16.43ms` from Minneapolis, US
73.21.68.101	AS7922 Comcast Cable Communications, LLC	`11.64ms` from Orlando, US
67.210.173.213	AS812 Rogers Communications Canada Inc.	`1.19ms` from Ottawa, CA
186.72.233.117	AS11556 Cable & Wireless Panama	`0.71ms` from Panama, PA
54.36.84.69	AS16276 OVH SAS	`0.06ms` from Roubaix, FR
121.138.130.149	AS4766 Korea Telecom	`1.28ms` from Seoul, KR
130.198.102.213	AS36351 IBM Cloud	`1.11ms` from Sydney, AU
182.171.236.149	AS2527 Sony Network Communications Inc.	`1.50ms` from Tokyo, JP
210.129.43.21	AS4694 IDC Frontier Inc.	`3.68ms` from Tokyo, JP
218.206.222.197	AS24445 Henan Mobile Communications Co.,Ltd	`5.35ms` from Zhengzhou, CN
52.207.114.165	AS14618 Amazon.com, Inc.	`0.46ms` from Ashburn, US
58.136.113.181	AS133481 AIS Fibre	`10.77ms` from Bangkok, TH
123.115.220.5	AS4808 China Unicom Beijing Province Network	`3.46ms` from Beijing, CN
117.10.237.229	AS4837 CHINA UNICOM China169 Backbone	`4.86ms` from Beijing, CN
76.152.80.165	AS7922 Comcast Cable Communications, LLC	`11.22ms` from Boston, US
128.85.220.5	AS8075 Microsoft Corporation	`0.31ms` from Boydton, US
75.133.207.53	AS20115 Charter Communications LLC	`12.47ms` from Chicago, US
192.96.170.85	AS53259 Jo-Carroll Energy, Inc. (NFP)	`4.13ms` from Chicago, US
99.48.236.5	AS7018 AT&T Enterprises, LLC	`18.93ms` from Chicago, US

Traceroute

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

traceroute -a -n -q1 -m17 1.51.163.127

traceroute to 1.51.163.127 (1.51.163.127): 17 hops max, 52 byte packets

1 [AS208450] 45.136.59.1 13.734 ms

2 [AS41371] 88.151.180.149 0.465 ms

3 *

4 *

5 *

6 *

7 [] 80.81.196.114 73.185 ms

8 *

9 *

10 *

11 [] 203.144.99.14 262.707 ms

12 [AS4538] 101.4.114.181 341.435 ms

13 *

14 [AS4538] 101.4.117.81 336.434 ms

15 *

16 *

17 *

Measurement taken from

IPinfo ProbeNet in Aktau, KZ

On March 13th 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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