1.51.0.0/16

AS4538 · China Education and Research Network Center

Need more data or want to access it via API or data downloads? Sign up to get free access

Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
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 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:  2025-09-04T00:59:41Z
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:          1.51.0.0/16
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2010-07-15T07:00:01Z
source:         APNIC

Nearby Ranges

BGP prefixes that overlap with 1.0.0.0/8

Range	ASN	Company	Num of IPs
1.128.0.0/11	AS1221	Telstra Limited	2,097,152
1.208.0.0/12	AS3786	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS45974	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS9526	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS9579	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS9569	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS7562	LG DACOM Corporation	1,048,576
1.160.0.0/12	AS3462	Data Communication Business Group,	1,048,576
1.208.0.0/12	AS9630	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS9638	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS23584	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS18305	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS55633	LG DACOM Corporation	1,048,576
1.192.0.0/13	AS137687	CHINANET henan province network	524,288
1.192.0.0/13	AS4134	CHINANET henan province network	524,288
1.80.0.0/13	AS4809	CHINANET SHAANXI PROVINCE NETWORK	524,288
1.56.0.0/13	AS4837	China Unicom Heilongjiang province network	524,288
1.80.0.0/13	AS134768	CHINANET SHAANXI PROVINCE NETWORK	524,288
1.24.0.0/13	AS9929	China unicom InnerMongolia province network	524,288
1.24.0.0/13	AS4837	China unicom InnerMongolia province network	524,288
1.80.0.0/13	AS4134	CHINANET SHAANXI PROVINCE NETWORK	524,288
1.120.0.0/13	AS1221	Telstra Limited	524,288
1.192.0.0/13	AS139587	CHINANET henan province network	524,288
1.24.0.0/13	AS139007	China unicom InnerMongolia province network	524,288
1.192.0.0/13	AS139018	CHINANET henan province network	524,288
1.68.0.0/14	AS142404	CHINANET SHANXI PROVINCE NETWORK	262,144
1.180.0.0/14	AS141006	CHINANET NeiMengGu province network	262,144
1.112.0.0/14	AS17676	SOFTBANK Corp.	262,144
1.68.0.0/14	AS132147	CHINANET SHANXI PROVINCE NETWORK	262,144
1.180.0.0/14	AS4134	CHINANET NeiMengGu province network	262,144
1.68.0.0/14	AS4134	CHINANET SHANXI PROVINCE NETWORK	262,144
1.68.0.0/14	AS4809	CHINANET SHANXI PROVINCE NETWORK	262,144
1.40.0.0/14	AS4804	OPTUS INTERNET - RETAIL	262,144
1.52.0.0/14	AS18403	FPT Telecom Company	262,144
1.12.0.0/14	AS45090	Tencent cloud computing (Beijing) Co., Ltd.	262,144
1.12.0.0/14	AS132203	Tencent cloud computing (Beijing) Co., Ltd.	262,144
1.188.0.0/14	AS4837	China Unicom Heilongjiang province network	262,144
1.204.0.0/14	AS4134	CHINANET GUIZHOU PROVINCE NETWORK	262,144
1.184.0.0/15	AS4538	China Education and Research Network	131,072
1.64.0.0/15	AS4760	PCCW Limited	131,072
1.34.0.0/15	AS3462	Data Communication Business Group,	131,072
1.48.0.0/15	AS4134	CHINANET GUIZHOU PROVINCE NETWORK	131,072
1.116.0.0/15	AS45090	Tencent cloud computing (Beijing) Co., Ltd.	131,072
1.11.0.0/16	AS17839	LG HelloVision Corp.	65,536
1.11.0.0/16	AS17598	LG HelloVision Corp.	65,536
1.169.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.200.0.0/16	AS24157	Vibo Telecom Inc.	65,536
1.168.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.167.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.186.0.0/16	AS8075	Microsoft Limited	65,536

Hosted domains

There are 6 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
1.51.2.46	cernic.net	3
1.51.29.58	nua.edu.cn	1
1.51.86.180	doalias.site	1

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

16,726 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
1.51.29.88	AS4538 China Education and Research Network Center	`6.35ms` from Shanghai, CN
1.51.214.0	AS4538 China Education and Research Network Center	`9.46ms` from Beijing, CN
1.51.213.131	AS4538 China Education and Research Network Center	`9.41ms` from Beijing, CN
1.51.193.5	AS4538 China Education and Research Network Center	`8.78ms` from Beijing, CN
1.51.241.113	AS4538 China Education and Research Network Center	`9.44ms` from Beijing, CN
1.51.220.128	AS4538 China Education and Research Network Center	`9.37ms` from Beijing, CN
1.51.203.139	AS4538 China Education and Research Network Center	`9.44ms` from Beijing, CN
1.51.194.114	AS4538 China Education and Research Network Center	`9.49ms` from Beijing, CN
1.51.232.156	AS4538 China Education and Research Network Center	`9.45ms` from Beijing, CN
1.51.27.52	AS4538 China Education and Research Network Center	`6.16ms` from Shanghai, CN
1.51.230.91	AS4538 China Education and Research Network Center	`9.46ms` from Beijing, CN
1.51.202.167	AS4538 China Education and Research Network Center	`9.49ms` from Beijing, CN
1.51.210.168	AS4538 China Education and Research Network Center	`9.51ms` from Beijing, CN
1.51.228.99	AS4538 China Education and Research Network Center	`9.42ms` from Beijing, CN
1.51.5.5	AS4538 China Education and Research Network Center	`5.09ms` from Hangzhou, CN
1.51.28.43	AS4538 China Education and Research Network Center	`6.23ms` from Shanghai, CN
1.51.204.100	AS4538 China Education and Research Network Center	`8.84ms` from Beijing, CN
1.51.217.135	AS4538 China Education and Research Network Center	`9.49ms` from Beijing, CN
1.51.234.100	AS4538 China Education and Research Network Center	`9.51ms` from Beijing, CN
1.51.221.5	AS4538 China Education and Research Network Center	`9.48ms` from Beijing, CN
1.51.233.34	AS4538 China Education and Research Network Center	`9.46ms` from Beijing, CN
1.51.222.69	AS4538 China Education and Research Network Center	`9.51ms` from Beijing, CN
1.51.200.2	AS4538 China Education and Research Network Center	`9.41ms` from Beijing, CN
1.51.211.5	AS4538 China Education and Research Network Center	`9.48ms` from Beijing, CN
1.51.199.161	AS4538 China Education and Research Network Center	`9.52ms` from Beijing, 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
13.68.231.176	AS8075 Microsoft Corporation	`0.36ms` from Ashburn, US
101.5.207.80	AS4538 China Education and Research Network Center	`6.16ms` from Beijing, CN
116.63.14.160	AS4808 China Unicom Beijing Province Network	`4.14ms` from Beijing, CN
75.67.68.48	AS7922 Comcast Cable Communications, LLC	`7.51ms` from Boston, US
98.23.97.240	AS7029 Windstream Communications LLC	`16.41ms` from Chicago, US
170.231.172.0	AS262590 NET ON LINE LTDA	`1.90ms` from Fortaleza, BR
77.4.85.32	AS6805 Telefonica Germany GmbH & Co.OHG	`14.08ms` from Frankfurt am Main, DE
73.166.210.64	AS7922 Comcast Cable Communications, LLC	`5.06ms` from Houston, US
3.8.209.128	AS16509 Amazon.com, Inc.	`0.15ms` from London, GB
83.48.58.64	AS3352 TELEFONICA DE ESPANA S.A.U.	`2.39ms` from Madrid, ES
34.107.202.160	AS396982 Google LLC	`0.08ms` from Melbourne, AU
20.33.10.0	AS8069 Microsoft Corporation	`0.19ms` from Pretoria, ZA
20.175.64.64	AS8075 Microsoft Corporation	`0.14ms` from Quebec, CA
110.44.204.0	AS45365 LG HelloVision Corp.	`4.80ms` from Seoul, KR
153.34.106.160	AS4837 CHINA UNICOM China169 Backbone	`4.62ms` from Shanghai, CN
80.93.146.64	AS35356 go mobile (Malta) Autonomous System	`1.02ms` from Swieqi, MT
114.24.211.64	AS3462 Data Communication Business Group	`1.48ms` from Taipei, TW
218.110.68.112	AS2527 Sony Network Communications Inc.	`2.96ms` from Tokyo, JP
46.161.220.16	AS210489 Beyond Relationship Marketing GmbH	`1.50ms` from Amsterdam, NL
111.165.20.32	AS4837 CHINA UNICOM China169 Backbone	`5.18ms` from Beijing, CN
84.167.191.16	AS3320 Deutsche Telekom AG	`3.95ms` from Berlin, DE
20.33.166.64	AS8069 Microsoft Corporation	`0.45ms` from Cardiff, GB
74.122.196.16	AS55154 Madgenius.com	`1.05ms` from Chicago, US
98.193.93.144	AS7922 Comcast Cable Communications, LLC	`3.50ms` from Chicago, US
35.158.9.16	AS16509 Amazon.com, Inc.	`0.18ms` 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 -f4 -m13 1.51.58.253

traceroute to 1.51.58.253 (1.51.58.253): 13 hops max, 52 byte packets

4 [AS7782] 63.140.116.73 36.122 ms

5 *

6 *

7 *

8 [AS6939] 184.105.64.129 192.304 ms

9 [] 123.255.91.118 191.971 ms

10 [AS4538] 101.4.114.181 226.541 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Anchorage, US

On September 11th 2025

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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales