1. All IP Ranges
  2. 1.0.0.0/8
  3. 1.51.0.0/16
  4. AS4538  | 1.51.0.0/16

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
1.208.0.0/12 AS9630 LG DACOM Corporation 1,048,576
1.208.0.0/12 AS9526 LG DACOM Corporation 1,048,576
1.208.0.0/12 AS55633 LG DACOM Corporation 1,048,576
1.208.0.0/12 AS9569 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 AS9579 LG DACOM Corporation 1,048,576
1.208.0.0/12 AS7562 LG DACOM Corporation 1,048,576
1.208.0.0/12 AS18305 LG DACOM Corporation 1,048,576
1.208.0.0/12 AS9638 LG DACOM Corporation 1,048,576
1.160.0.0/12 AS3462 Data Communication Business Group, 1,048,576
1.208.0.0/12 AS23584 LG DACOM Corporation 1,048,576
1.224.0.0/13 AS9647 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS38688 SK Broadband Co Ltd 524,288
1.24.0.0/13 AS4837 China unicom InnerMongolia province network 524,288
1.24.0.0/13 AS9929 China unicom InnerMongolia province network 524,288
1.224.0.0/13 AS9978 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS9967 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS23579 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS23601 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS9638 SK Broadband Co Ltd 524,288
1.80.0.0/13 AS4134 CHINANET SHAANXI PROVINCE NETWORK 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
1.224.0.0/13 AS9851 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS45370 SK Broadband Co Ltd 524,288
1.120.0.0/13 AS1221 Telstra Limited 524,288
1.224.0.0/13 AS131852 SK Broadband Co Ltd 524,288
1.192.0.0/13 AS4134 CHINANET henan province network 524,288
1.224.0.0/13 AS10196 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS17846 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS9318 SK Broadband Co Ltd 524,288
1.56.0.0/13 AS4837 China Unicom Heilongjiang 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 AS46004 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS10069 SK Broadband Co Ltd 524,288
1.192.0.0/13 AS139018 CHINANET henan province network 524,288
1.24.0.0/13 AS139007 China unicom InnerMongolia province network 524,288
1.224.0.0/13 AS55615 SK Broadband Co Ltd 524,288
1.224.0.0/13 AS17873 SK Broadband Co Ltd 524,288
1.80.0.0/13 AS4809 CHINANET SHAANXI PROVINCE NETWORK 524,288
1.192.0.0/13 AS139587 CHINANET henan province network 524,288
1.12.0.0/14 AS45090 Tencent cloud computing (Beijing) Co., Ltd. 262,144
1.68.0.0/14 AS4809 CHINANET SHANXI PROVINCE NETWORK 262,144
1.12.0.0/14 AS132203 Tencent cloud computing (Beijing) Co., Ltd. 262,144
1.204.0.0/14 AS4134 CHINANET GUIZHOU PROVINCE NETWORK 262,144
1.68.0.0/14 AS132147 CHINANET SHANXI PROVINCE NETWORK 262,144
1.68.0.0/14 AS4134 CHINANET SHANXI PROVINCE NETWORK 262,144

Hosted domains

There are 7 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 cernet.net 3
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

13,553 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
1.51.19.63 AS4538 China Education and Research Network Center 6.47ms from Shanghai, CN
1.51.112.1 AS4538 China Education and Research Network Center 13.50ms from Shanghai, CN
1.51.1.5 AS4538 China Education and Research Network Center 5.71ms from Qingdao, CN
1.51.25.100 AS4538 China Education and Research Network Center 6.14ms from Shanghai, CN
1.51.3.17 AS4538 China Education and Research Network Center 1.81ms from Beijing, CN
1.51.27.76 AS4538 China Education and Research Network Center 6.16ms from Shanghai, CN
1.51.28.131 AS4538 China Education and Research Network Center 6.09ms from Shanghai, CN
1.51.6.141 AS4538 China Education and Research Network Center 1.61ms from Beijing, CN
1.51.26.2 AS4538 China Education and Research Network Center 6.29ms from Shanghai, CN
1.51.2.33 AS4538 China Education and Research Network Center 1.70ms from Beijing, CN
1.51.24.18 AS4538 China Education and Research Network Center 6.12ms from Shanghai, CN
1.51.5.5 AS4538 China Education and Research Network Center 5.43ms from Hangzhou, CN
1.51.29.94 AS4538 China Education and Research Network Center 6.23ms from Shanghai, CN
1.51.210.71 AS4538 China Education and Research Network Center 5.81ms from Qingdao, CN
1.51.213.181 AS4538 China Education and Research Network Center 5.75ms from Qingdao, CN
1.51.253.72 AS4538 China Education and Research Network Center 5.76ms from Qingdao, CN
1.51.201.26 AS4538 China Education and Research Network Center 5.70ms from Qingdao, CN
1.51.221.69 AS4538 China Education and Research Network Center 5.75ms from Qingdao, CN
1.51.245.28 AS4538 China Education and Research Network Center 5.75ms from Qingdao, CN
1.51.216.249 AS4538 China Education and Research Network Center 5.74ms from Qingdao, CN
1.51.244.238 AS4538 China Education and Research Network Center 5.76ms from Qingdao, CN
1.51.229.77 AS4538 China Education and Research Network Center 5.77ms from Qingdao, CN
1.51.203.82 AS4538 China Education and Research Network Center 5.78ms from Qingdao, CN
1.51.204.65 AS4538 China Education and Research Network Center 5.76ms from Qingdao, CN
1.51.220.171 AS4538 China Education and Research Network Center 5.77ms 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
150.136.94.208 AS31898 Oracle Corporation 0.30ms from Ashburn, US
75.236.202.160 AS6167 Verizon Business 7.56ms from Atlanta, US
79.248.181.240 AS3320 Deutsche Telekom AG 5.19ms from Duesseldorf, DE
96.53.130.144 AS6327 Shaw Communications 4.51ms from Edmonton, CA
98.209.99.32 AS7922 Comcast Cable Communications, LLC 7.17ms from Flint, US
4.158.140.176 AS8075 Microsoft Corporation 0.17ms from London, GB
87.102.105.224 AS12390 KCOM GROUP LIMITED 3.22ms from Manchester, GB
118.10.49.176 AS4713 NTT DOCOMO BUSINESS,Inc. 2.80ms from Osaka, JP
190.219.180.64 AS18809 Cable Onda 6.95ms from Panama, PA
13.217.134.144 AS14618 Amazon.com, Inc. 0.19ms from Reston, US
159.54.130.0 AS31898 Oracle Corporation 0.15ms from Santiago de Queretaro, MX
190.166.76.96 AS6400 Compañía Dominicana de Teléfonos S. A. 2.11ms from Santo Domingo, DO
14.43.80.16 AS4766 Korea Telecom 6.63ms from Seoul, KR
115.161.72.0 AS9689 SK Broadband Co Ltd 1.84ms from Seoul, KR
20.37.196.240 AS8075 Microsoft Corporation 0.71ms from Sydney, AU
36.225.16.96 AS3462 Data Communication Business Group 0.46ms from Taipei, TW
136.143.220.224 AS54614 CIK Telecom INC 4.42ms from Toronto, CA
5.219.238.176 AS58224 Iran Telecommunication Company PJS 19.98ms from Az Za`ayin, QA
91.41.23.48 AS3320 Deutsche Telekom AG 3.11ms from Berlin, DE
89.122.242.0 AS9050 Orange Romania S.A. 0.41ms from Bucharest, RO
129.21.87.176 AS4385 Rochester Institute of Technology 3.51ms from Buffalo, US
87.61.94.16 AS3292 TDC Holding A/S 8.26ms from Copenhagen, DK
115.113.94.96 AS4755 TATA Communications formerly VSNL is Leading ISP 1.75ms from Delhi, IN
185.51.87.0 AS50064 TK Networks GmbH 4.08ms from Frankfurt am Main, DE
49.131.81.32 AS17924 SmarTone Mobile Communications Ltd 13.90ms from Hong Kong, HK

Traceroute

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

$
traceroute -a -n -q1 -m16 1.51.170.182
traceroute to 1.51.170.182 (1.51.170.182): 16 hops max, 52 byte packets
1 [AS198584] 93.95.115.1 1.789 ms
2 [] 194.62.6.4 0.779 ms
3 *
4 [] 194.62.6.15 4.161 ms
5 [] 193.239.118.168 10.692 ms
6 [AS23764] 5.154.154.117 14.188 ms
7 [] 69.194.165.253 173.518 ms
8 *
9 [] 203.22.177.246 184.463 ms
10 [] 203.144.99.14 188.147 ms
11 [AS4538] 101.4.114.181 233.216 ms
12 *
13 [AS4538] 101.4.117.81 241.94 ms
14 *
15 *
16 *
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
On

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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