1.51.0.0/16

AS4538 · China Education and Research Network Center

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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:  2025-11-18T00:26:28Z
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:          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
1.160.0.0/12	AS3462	Data Communication Business Group,	1,048,576
1.208.0.0/12	AS3786	LG DACOM Corporation	1,048,576
1.80.0.0/13	AS4809	CHINANET SHAANXI PROVINCE NETWORK	524,288
1.80.0.0/13	AS4134	CHINANET SHAANXI PROVINCE NETWORK	524,288
1.56.0.0/13	AS4837	China Unicom Heilongjiang province network	524,288
1.192.0.0/13	AS4134	CHINANET henan province network	524,288
1.224.0.0/13	AS23579	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS9318	SK Broadband Co Ltd	524,288
1.24.0.0/13	AS4837	China unicom InnerMongolia province network	524,288
1.24.0.0/13	AS139007	China unicom InnerMongolia province network	524,288
1.120.0.0/13	AS1221	Telstra Limited	524,288
1.224.0.0/13	AS10069	SK Broadband Co Ltd	524,288
1.24.0.0/13	AS9929	China unicom InnerMongolia province network	524,288
1.192.0.0/13	AS139587	CHINANET henan province network	524,288
1.192.0.0/13	AS139018	CHINANET henan province network	524,288
1.224.0.0/13	AS131852	SK Broadband Co Ltd	524,288
1.192.0.0/13	AS137687	CHINANET henan province network	524,288
1.80.0.0/13	AS134768	CHINANET SHAANXI PROVINCE NETWORK	524,288
1.12.0.0/14	AS132203	Tencent cloud computing (Beijing) Co., Ltd.	262,144
1.68.0.0/14	AS132147	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
1.180.0.0/14	AS141006	CHINANET NeiMengGu province network	262,144
1.112.0.0/14	AS17676	SOFTBANK Corp.	262,144
1.68.0.0/14	AS142404	CHINANET SHANXI PROVINCE NETWORK	262,144
1.68.0.0/14	AS4809	CHINANET SHANXI PROVINCE NETWORK	262,144
1.180.0.0/14	AS4134	CHINANET NeiMengGu province network	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
1.68.0.0/14	AS4134	CHINANET SHANXI PROVINCE NETWORK	262,144
1.12.0.0/14	AS45090	Tencent cloud computing (Beijing) Co., Ltd.	262,144
1.116.0.0/15	AS45090	Tencent cloud computing (Beijing) Co., Ltd.	131,072
1.48.0.0/15	AS4134	CHINANET GUIZHOU PROVINCE NETWORK	131,072
1.184.0.0/15	AS4538	China Education and Research Network	131,072
1.34.0.0/15	AS3462	Data Communication Business Group,	131,072
1.64.0.0/15	AS4760	PCCW Limited	131,072
1.44.0.0/16	AS7474	SingTel Optus Pty Ltd	65,536
1.34.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.186.0.0/16	AS8075	Microsoft Limited	65,536
1.174.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.172.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.170.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.171.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.173.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.35.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.175.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.166.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.163.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536
1.167.0.0/16	AS3462	Chunghwa Telecom Co.,Ltd.	65,536

Hosted domains

There are 6 domain names hosted across 5 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	2
1.51.27.102	njgenfang.com	1
1.51.86.180	doalias.site	1
1.51.27.51	ika123.cn	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

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

IP Address	ASN	Details
1.51.3.17	AS4538 China Education and Research Network Center	`1.90ms` from Beijing, CN
1.51.5.5	AS4538 China Education and Research Network Center	`5.26ms` from Hangzhou, CN
1.51.28.54	AS4538 China Education and Research Network Center	`6.15ms` from Shanghai, CN
1.51.25.14	AS4538 China Education and Research Network Center	`6.26ms` from Shanghai, CN
1.51.1.5	AS4538 China Education and Research Network Center	`5.73ms` from Qingdao, CN
1.51.112.1	AS4538 China Education and Research Network Center	`13.38ms` from Shanghai, CN
1.51.26.23	AS4538 China Education and Research Network Center	`6.11ms` from Shanghai, CN
1.51.27.20	AS4538 China Education and Research Network Center	`6.03ms` from Shanghai, CN
1.51.6.242	AS4538 China Education and Research Network Center	`1.64ms` from Beijing, CN
1.51.2.207	AS4538 China Education and Research Network Center	`1.63ms` from Beijing, CN
1.51.24.7	AS4538 China Education and Research Network Center	`6.27ms` from Shanghai, CN
1.51.19.54	AS4538 China Education and Research Network Center	`6.41ms` from Shanghai, CN
1.51.29.116	AS4538 China Education and Research Network Center	`6.23ms` from Shanghai, CN
1.51.255.147	AS4538 China Education and Research Network Center	`6.13ms` from Qingdao, 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
75.230.254.64	AS6167 Verizon Business	`19.91ms` from Chicago, US
212.133.248.0	AS8386 Vodafone Net Iletisim Hizmetler AS	`4.96ms` from Denizli, TR
52.214.76.176	AS16509 Amazon.com, Inc.	`0.15ms` from Dublin, IE
213.23.59.128	AS3209 Vodafone GmbH	`3.96ms` from Frankfurt am Main, DE
47.52.88.16	AS45102 Alibaba (US) Technology Co., Ltd.	`1.13ms` from Hong Kong, HK
13.94.21.0	AS8075 Microsoft Corporation	`0.81ms` from Hong Kong, HK
94.15.149.80	AS5607 Sky UK Limited	`3.58ms` from London, GB
76.87.76.64	AS20001 Charter Communications Inc	`6.43ms` from Los Angeles, US
68.120.95.240	AS7018 AT&T Enterprises, LLC	`2.29ms` from Los Angeles, US
81.179.94.64	AS13285 TalkTalk Communications Limited	`1.75ms` from Manchester, GB
79.77.207.240	AS13285 TalkTalk Communications Limited	`4.82ms` from Manchester, GB
185.207.190.16	AS59939 WIBO Baltic UAB	`0.27ms` from Meppel, NL
34.205.36.128	AS14618 Amazon.com, Inc.	`0.22ms` from Reston, US
125.176.51.176	AS17858 LG POWERCOMM	`1.35ms` from Seoul, KR
85.211.31.176	AS8075 Microsoft Corporation	`1.39ms` from Singapore, SG
120.101.95.192	AS1659 Taiwan Academic Network (TANet) Information Center	`3.40ms` from Taipei, TW
80.83.128.32	AS21214 Geonet Ltd.	`0.35ms` from Tbilisi, GE
14.14.4.16	AS131927 TV Matsumoto Cablevision	`11.56ms` from Tokyo, JP
140.227.166.160	AS2514 NTT PC Communications, Inc.	`0.80ms` from Tokyo, JP
142.181.89.96	AS577 Bell Canada	`3.93ms` from Toronto, CA
102.152.8.16	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`1.18ms` from Tunis, TN
41.100.234.208	AS36947 Telecom Algeria	`12.76ms` from Valencia, ES
85.144.152.112	AS50266 Odido Netherlands B.V.	`5.30ms` from Amsterdam, NL
155.52.51.160	AS40831 Mass General Brigham Incorporated	`10.93ms` from Ashburn, US
72.106.90.160	AS6167 Verizon Business	`10.84ms` from Ashburn, US

Traceroute

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

traceroute -a -n -q1 -f4 -m11 1.51.67.225

traceroute to 1.51.67.225 (1.51.67.225): 11 hops max, 52 byte packets

4 [AS3356] 4.71.141.82 160.7 ms

5 *

6 *

7 *

8 [AS4538] 101.4.114.181 240.247 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Charlotte, US

On December 6th 2025

What are IP address ranges?

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