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:  2025-09-04T00:59:41Z
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	AS9526	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS9638	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS9569	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS18305	LG DACOM Corporation	1,048,576
1.160.0.0/12	AS3462	Data Communication Business Group,	1,048,576
1.208.0.0/12	AS9579	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS9630	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS23584	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS7562	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS45974	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS3786	LG DACOM Corporation	1,048,576
1.208.0.0/12	AS55633	LG DACOM Corporation	1,048,576
1.80.0.0/13	AS4134	CHINANET SHAANXI PROVINCE NETWORK	524,288
1.224.0.0/13	AS9277	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS55586	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS55615	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS9318	SK Broadband Co Ltd	524,288
1.192.0.0/13	AS4134	CHINANET henan province network	524,288
1.224.0.0/13	AS38688	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS45370	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS9978	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS9647	SK Broadband Co Ltd	524,288
1.120.0.0/13	AS1221	Telstra Limited	524,288
1.24.0.0/13	AS9929	China unicom InnerMongolia province network	524,288
1.192.0.0/13	AS137687	CHINANET henan province network	524,288
1.224.0.0/13	AS9851	SK Broadband Co Ltd	524,288
1.80.0.0/13	AS4809	CHINANET SHAANXI PROVINCE NETWORK	524,288
1.224.0.0/13	AS10069	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS17873	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS10196	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS23601	SK Broadband Co Ltd	524,288
1.192.0.0/13	AS139587	CHINANET henan province network	524,288
1.224.0.0/13	AS131852	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS17846	SK Broadband Co Ltd	524,288
1.56.0.0/13	AS4837	China Unicom Heilongjiang province network	524,288
1.224.0.0/13	AS9638	SK Broadband Co Ltd	524,288
1.80.0.0/13	AS134768	CHINANET SHAANXI PROVINCE NETWORK	524,288
1.224.0.0/13	AS23579	SK Broadband Co Ltd	524,288
1.224.0.0/13	AS9967	SK Broadband Co Ltd	524,288
1.24.0.0/13	AS139007	China unicom InnerMongolia province network	524,288
1.224.0.0/13	AS46004	SK Broadband Co Ltd	524,288
1.24.0.0/13	AS4837	China unicom InnerMongolia province network	524,288
1.192.0.0/13	AS139018	CHINANET henan province network	524,288
1.188.0.0/14	AS4837	China Unicom Heilongjiang province network	262,144
1.68.0.0/14	AS132147	CHINANET SHANXI PROVINCE NETWORK	262,144
1.52.0.0/14	AS18403	FPT Telecom Company	262,144
1.40.0.0/14	AS4804	OPTUS INTERNET - RETAIL	262,144
1.68.0.0/14	AS4809	CHINANET SHANXI PROVINCE NETWORK	262,144
1.12.0.0/14	AS45090	Tencent cloud computing (Beijing) Co., Ltd.	262,144

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	cernet.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

13,362 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
1.51.29.34	AS4538 China Education and Research Network Center	`6.12ms` from Shanghai, CN
1.51.2.254	AS4538 China Education and Research Network Center	`1.63ms` from Beijing, CN
1.51.5.5	AS4538 China Education and Research Network Center	`5.17ms` from Hangzhou, CN
1.51.24.20	AS4538 China Education and Research Network Center	`6.33ms` from Shanghai, CN
1.51.1.5	AS4538 China Education and Research Network Center	`5.72ms` from Qingdao, CN
1.51.27.78	AS4538 China Education and Research Network Center	`6.14ms` from Shanghai, CN
1.51.18.6	AS4538 China Education and Research Network Center	`7.34ms` from Shanghai, CN
1.51.3.126	AS4538 China Education and Research Network Center	`2.02ms` from Beijing, CN
1.51.6.147	AS4538 China Education and Research Network Center	`1.68ms` from Beijing, CN
1.51.25.90	AS4538 China Education and Research Network Center	`6.14ms` from Shanghai, CN
1.51.19.63	AS4538 China Education and Research Network Center	`6.55ms` from Shanghai, CN
1.51.28.131	AS4538 China Education and Research Network Center	`6.15ms` from Shanghai, CN
1.51.26.21	AS4538 China Education and Research Network Center	`6.30ms` from Shanghai, CN
1.51.242.142	AS4538 China Education and Research Network Center	`5.83ms` from Qingdao, CN
1.51.229.71	AS4538 China Education and Research Network Center	`5.77ms` from Qingdao, CN
1.51.217.40	AS4538 China Education and Research Network Center	`5.78ms` from Qingdao, CN
1.51.211.31	AS4538 China Education and Research Network Center	`5.81ms` from Qingdao, CN
1.51.252.30	AS4538 China Education and Research Network Center	`5.79ms` from Qingdao, CN
1.51.230.0	AS4538 China Education and Research Network Center	`5.82ms` from Qingdao, CN
1.51.222.38	AS4538 China Education and Research Network Center	`5.79ms` from Qingdao, CN
1.51.226.32	AS4538 China Education and Research Network Center	`5.86ms` from Qingdao, CN
1.51.215.240	AS4538 China Education and Research Network Center	`5.77ms` from Qingdao, CN
1.51.232.193	AS4538 China Education and Research Network Center	`5.77ms` from Qingdao, CN
1.51.250.95	AS4538 China Education and Research Network Center	`5.84ms` from Qingdao, CN
1.51.201.7	AS4538 China Education and Research Network Center	`5.78ms` 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
81.241.81.160	AS5432 Proximus NV	`6.94ms` from Amsterdam, NL
69.36.204.144	AS30263 Cal-Ore Telephone Co.	`10.39ms` from Bend, US
212.133.248.0	AS8386 Vodafone Net Iletisim Hizmetler AS	`6.90ms` from Denizli, TR
87.184.207.160	AS3320 Deutsche Telekom AG	`4.82ms` from Duesseldorf, DE
109.200.139.240	AS210078 "INFORM-HOLDING" LTD.	`8.83ms` from Krasnodar, RU
31.135.150.112	AS20539 Technical Centre Radio Systems Ltd.	`4.15ms` from Kyiv, UA
62.211.55.0	AS3269 Telecom Italia S.p.A.	`4.54ms` from Milan, IT
118.10.49.176	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.69ms` from Osaka, JP
88.169.152.64	AS12322 Free SAS	`2.69ms` from Paris, FR
181.175.213.144	AS14522 SERVICIOS DE TELECOMUNICACIONES SETEL S.A. (XTRIM EC)	`2.25ms` from Quito, EC
18.211.162.112	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
60.243.83.112	AS17488 Hathway IP Over Cable Internet	`1.61ms` from Saint Thomas Mount, IN
170.64.189.160	AS14061 DigitalOcean, LLC	`0.23ms` from Sydney, AU
117.72.104.80	AS141679 China Telecom Beijing Tianjin Hebei Big Data Industry Park Branch	`0.31ms` from Tianjin, CN
105.105.158.160	AS36947 Telecom Algeria	`11.58ms` from Tunis, TN
91.230.76.176	AS50625 Krosnienskie Centrum Informatyczne "KROSOFT"	`6.94ms` from Warsaw, PL
185.44.160.64	AS62167 Tismi BV	`0.62ms` from Amsterdam, NL
168.254.4.112	AS11686 Zayo Bandwidth	`11.41ms` from Atlanta, US
141.135.135.192	AS6848 Telenet BV	`7.81ms` from Brussels, BE
197.147.133.176	AS36884 Wana Corporate	`13.12ms` from Casablanca, MA
176.106.10.176	AS52043 LLC "Multiservice"	`2.99ms` from Krasnodar, RU
63.241.42.32	AS13788 US Courts	`2.13ms` from Los Angeles, US
91.54.93.160	AS3320 Deutsche Telekom AG	`6.00ms` from Nuernberg, DE
100.24.98.16	AS14618 Amazon.com, Inc.	`0.19ms` from Reston, US
60.77.79.112	AS17676 SoftBank Corp.	`6.14ms` from Tokyo, JP

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 1.51.4.177

traceroute to 1.51.4.177 (1.51.4.177): 11 hops max, 52 byte packets

4 [] 69.194.169.202 0.814 ms

5 *

6 [] 203.22.177.246 38.005 ms

7 [] 203.144.99.14 34.642 ms

8 [AS4538] 101.4.114.181 69.232 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Singapore, SG

On November 6th 2025

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