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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
auth:           # Filtered
remarks:        timezone GMT+8
remarks:        http://www.ccert.edu.cn
remarks:        [email protected] 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:         [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
nic-hdl:        AC1685-AP
remarks:        Generated from irt object IRT-CERNET-AP
remarks:        [email protected] was validated on 2025-08-15
abuse-mailbox:  [email protected]
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:         [email protected]
remarks:        [email protected]
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
1.24.0.0/13 AS9929 China unicom InnerMongolia 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
1.80.0.0/13 AS134768 CHINANET SHAANXI PROVINCE NETWORK 524,288
1.120.0.0/13 AS1221 Telstra Limited 524,288
1.192.0.0/13 AS137687 CHINANET henan province network 524,288
1.192.0.0/13 AS4134 CHINANET henan province network 524,288
1.56.0.0/13 AS4837 China Unicom Heilongjiang province network 524,288
1.224.0.0/13 AS10069 SK Broadband Co Ltd 524,288
1.24.0.0/13 AS4837 China unicom InnerMongolia province network 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
1.224.0.0/13 AS131852 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
1.80.0.0/13 AS4134 CHINANET SHAANXI PROVINCE NETWORK 524,288
1.180.0.0/14 AS4134 CHINANET NeiMengGu province network 262,144
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
1.68.0.0/14 AS4809 CHINANET SHANXI PROVINCE NETWORK 262,144
1.12.0.0/14 AS45090 Tencent cloud computing (Beijing) Co., Ltd. 262,144
1.52.0.0/14 AS18403 FPT Telecom Company 262,144
1.188.0.0/14 AS4837 China Unicom Heilongjiang province network 262,144
1.68.0.0/14 AS142404 CHINANET SHANXI PROVINCE NETWORK 262,144
1.180.0.0/14 AS141006 CHINANET NeiMengGu province network 262,144
1.204.0.0/14 AS4134 CHINANET GUIZHOU PROVINCE NETWORK 262,144
1.112.0.0/14 AS17676 SOFTBANK Corp. 262,144
1.68.0.0/14 AS4134 CHINANET SHANXI PROVINCE NETWORK 262,144
1.40.0.0/14 AS4804 OPTUS INTERNET - RETAIL 262,144
1.34.0.0/15 AS3462 Data Communication Business Group, 131,072
1.184.0.0/15 AS4538 China Education and Research Network 131,072
1.116.0.0/15 AS45090 Tencent cloud computing (Beijing) Co., Ltd. 131,072
1.64.0.0/15 AS4760 PCCW Limited 131,072
1.48.0.0/15 AS4134 CHINANET GUIZHOU PROVINCE NETWORK 131,072
1.34.0.0/16 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
1.173.0.0/16 AS3462 Chunghwa Telecom Co.,Ltd. 65,536
1.171.0.0/16 AS3462 Chunghwa Telecom Co.,Ltd. 65,536
1.169.0.0/16 AS3462 Chunghwa Telecom Co.,Ltd. 65,536
1.170.0.0/16 AS3462 Chunghwa Telecom Co.,Ltd. 65,536
1.172.0.0/16 AS3462 Chunghwa Telecom Co.,Ltd. 65,536
1.174.0.0/16 AS3462 Chunghwa Telecom Co.,Ltd. 65,536
1.164.0.0/16 AS3462 Chunghwa Telecom Co.,Ltd. 65,536
1.163.0.0/16 AS3462 Chunghwa Telecom Co.,Ltd. 65,536
1.165.0.0/16 AS3462 Chunghwa Telecom Co.,Ltd. 65,536
1.161.0.0/16 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

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Pingable IPs

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

IP Address ASN Details
1.51.5.5 AS4538 China Education and Research Network Center 5.26ms from Hangzhou, 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
1.51.6.242 AS4538 China Education and Research Network Center 1.64ms from Beijing, CN
1.51.112.1 AS4538 China Education and Research Network Center 13.38ms from Shanghai, CN
1.51.3.17 AS4538 China Education and Research Network Center 1.90ms from Beijing, CN
1.51.27.20 AS4538 China Education and Research Network Center 6.03ms from Shanghai, CN
1.51.28.54 AS4538 China Education and Research Network Center 6.15ms from Shanghai, CN
1.51.26.23 AS4538 China Education and Research Network Center 6.11ms from Shanghai, CN
1.51.25.14 AS4538 China Education and Research Network Center 6.26ms from Shanghai, CN
1.51.2.207 AS4538 China Education and Research Network Center 1.63ms from Beijing, CN
1.51.29.116 AS4538 China Education and Research Network Center 6.23ms from Shanghai, CN
1.51.1.5 AS4538 China Education and Research Network Center 5.73ms from Qingdao, 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
104.81.2.176 AS16625 Akamai Technologies, Inc. 0.31ms from Berlin, DE
91.41.23.48 AS3320 Deutsche Telekom AG 3.04ms from Berlin, DE
181.233.14.0 AS271433 MAIA E DUTRA LTDA 9.87ms from Campina Grande, BR
34.241.117.96 AS16509 Amazon.com, Inc. 0.15ms from Dublin, IE
134.175.132.32 AS45090 Shenzhen Tencent Computer Systems Company Limited 2.15ms from Guangzhou, CN
115.239.64.240 AS4134 CHINANET-BACKBONE 7.47ms from Hangzhou, CN
13.94.21.0 AS8075 Microsoft Corporation 0.81ms from Hong Kong, HK
42.178.238.160 AS4837 CHINA UNICOM China169 Backbone 6.13ms from Liaoyang, CN
31.118.244.160 AS2856 British Telecommunications PLC 2.07ms from London, GB
2.124.33.224 AS5607 Sky UK Limited 7.98ms from London, GB
34.104.33.32 AS396982 Google LLC 0.10ms from Melbourne, AU
202.138.31.32 AS9443 Vocus Retail 1.34ms from Melbourne, AU
185.207.190.16 AS59939 WIBO Baltic UAB 0.27ms from Meppel, NL
3.6.96.128 AS16509 Amazon.com, Inc. 0.17ms from Mumbai, IN
119.229.168.112 AS17511 OPTAGE Inc. 2.61ms from Osaka, JP
90.117.204.192 AS3215 Orange S.A. 16.51ms from Paris, FR
170.83.247.128 AS271531 TURBO LOGNET TLN TELECOM LTDA 1.13ms from Rio de Janeiro, BR
125.241.208.144 AS17858 LG POWERCOMM 5.63ms from Seoul, KR
208.88.83.224 AS32977 CareerBuilder, LLC 1.45ms from Atlanta, US
91.10.224.208 AS3320 Deutsche Telekom AG 5.17ms from Frankfurt am Main, DE
156.232.154.96 AS134548 DXTL Tseung Kwan O Service 0.75ms from Hong Kong, HK
3.8.209.128 AS16509 Amazon.com, Inc. 0.14ms from London, GB
91.126.60.16 AS35699 Adamo Telecom Iberia S.A. 6.36ms from Madrid, ES
86.193.197.112 AS3215 Orange S.A. 9.72ms from Marseille, FR
68.218.164.48 AS8075 Microsoft Corporation 0.68ms from Melbourne, AU

Traceroute

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

$
traceroute -a -n -q1 -f8 -m16 1.51.82.122
traceroute to 1.51.82.122 (1.51.82.122): 16 hops max, 52 byte packets
8 [] 185.1.226.96 183.727 ms
9 *
10 *
11 *
12 *
13 [AS4538] 101.4.114.181 413.178 ms
14 *
15 *
16 *
Measurement taken from IPinfo ProbeNet in Belo Horizonte, BR
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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