121.250.0.0/15
AS4538 · China Education and Research Network Center
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| Country |
China
|
| Domain | cernet.edu.cn |
| ASN | AS4538 |
| Parent Range | 121.248.0.0/14 |
| Registry | APNIC |
| ID | NJR-CERNET |
WHOIS Details
inetnum: 121.248.0.0 - 121.251.255.255 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: 2020-09-03T09:15:58Z 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: 121.250.0.0/15 descr: CERNET origin: AS4538 mnt-by: MAINT-CERNET-AP last-modified: 2009-01-05T03:10:57Z source: APNIC
Overlapping Ranges
BGP prefixes that contain 121.250.0.0/15
| Range | ASN | Company | Num of IPs |
|---|---|---|---|
| 121.248.0.0/14 | AS4538 | China Education and Research Network | 262,144 |
Nearby Ranges
BGP prefixes that overlap with 121.0.0.0/8
| Range | ASN | Company | Num of IPs |
|---|---|---|---|
| 121.128.0.0/11 | AS17588 | Korea Telecom | 2,097,152 |
| 121.160.0.0/11 | AS38089 | Korea Telecom | 2,097,152 |
| 121.128.0.0/11 | AS38122 | Korea Telecom | 2,097,152 |
| 121.128.0.0/11 | AS4766 | Korea Telecom | 2,097,152 |
| 121.128.0.0/11 | AS9647 | Korea Telecom | 2,097,152 |
| 121.160.0.0/11 | AS4766 | Korea Telecom | 2,097,152 |
| 121.128.0.0/11 | AS9856 | Korea Telecom | 2,097,152 |
| 121.160.0.0/11 | AS23582 | Korea Telecom | 2,097,152 |
| 121.128.0.0/11 | AS18333 | Korea Telecom | 2,097,152 |
| 121.224.0.0/12 | AS4134 | CHINANET jiangsu province network | 1,048,576 |
| 121.224.0.0/12 | AS137702 | CHINANET jiangsu province network | 1,048,576 |
| 121.224.0.0/12 | AS134770 | CHINANET jiangsu province network | 1,048,576 |
| 121.224.0.0/12 | AS140292 | CHINANET jiangsu province network | 1,048,576 |
| 121.224.0.0/12 | AS134756 | CHINANET jiangsu province network | 1,048,576 |
| 121.224.0.0/12 | AS137697 | CHINANET jiangsu province network | 1,048,576 |
| 121.224.0.0/12 | AS146966 | CHINANET jiangsu province network | 1,048,576 |
| 121.224.0.0/12 | AS137699 | CHINANET jiangsu province network | 1,048,576 |
| 121.208.0.0/12 | AS1221 | Telstra Limited | 1,048,576 |
| 121.16.0.0/13 | AS4837 | China Unicom Hebei province network | 524,288 |
| 121.8.0.0/13 | AS135089 | CHINANET Guangdong province network | 524,288 |
| 121.8.0.0/13 | AS140308 | CHINANET Guangdong province network | 524,288 |
| 121.8.0.0/13 | AS136199 | CHINANET Guangdong province network | 524,288 |
| 121.112.0.0/13 | AS4713 | NTT DOCOMO BUSINESS,Inc. | 524,288 |
| 121.8.0.0/13 | AS4134 | CHINANET Guangdong province network | 524,288 |
| 121.32.0.0/14 | AS4134 | CHINANET Guangdong province network | 262,144 |
| 121.64.0.0/14 | AS3786 | LG DACOM Corporation | 262,144 |
| 121.60.0.0/14 | AS4134 | CHINANET Hubei province network | 262,144 |
| 121.64.0.0/14 | AS23555 | LG DACOM Corporation | 262,144 |
| 121.204.0.0/14 | AS4134 | CHINANET Fujian province network | 262,144 |
| 121.204.0.0/14 | AS133776 | CHINANET Fujian province network | 262,144 |
| 121.64.0.0/14 | AS17598 | LG DACOM Corporation | 262,144 |
| 121.24.0.0/14 | AS4837 | China Unicom Hebei province network | 262,144 |
| 121.40.0.0/14 | AS37963 | Aliyun Computing Co., LTD | 262,144 |
| 121.204.0.0/14 | AS133775 | CHINANET Fujian province network | 262,144 |
| 121.80.0.0/14 | AS17511 | OPTAGE Inc. | 262,144 |
| 121.248.0.0/14 | AS4538 | China Education and Research Network | 262,144 |
| 121.84.0.0/14 | AS17511 | OPTAGE Inc. | 262,144 |
| 121.64.0.0/14 | AS17586 | LG DACOM Corporation | 262,144 |
| 121.196.0.0/14 | AS37963 | Aliyun Computing Co., LTD | 262,144 |
| 121.204.0.0/14 | AS133774 | CHINANET Fujian province network | 262,144 |
| 121.60.0.0/14 | AS148981 | CHINANET Hubei province network | 262,144 |
| 121.98.0.0/15 | AS9790 | Two Degrees Mobile Limited | 131,072 |
| 121.2.0.0/15 | AS2527 | Sony Network Communications Inc. | 131,072 |
| 121.124.0.0/15 | AS9318 | SK Broadband Co Ltd | 131,072 |
| 121.44.0.0/15 | AS7545 | iiNet Limited | 131,072 |
| 121.4.0.0/15 | AS45090 | Tencent cloud computing (Beijing) Co., Ltd. | 131,072 |
| 121.4.0.0/15 | AS132203 | Tencent cloud computing (Beijing) Co., Ltd. | 131,072 |
| 121.44.0.0/15 | AS4739 | iiNet Limited | 131,072 |
| 121.194.0.0/15 | AS4538 | China Education and Research Network | 131,072 |
| 121.28.0.0/15 | AS4837 | China Unicom Hebei province network | 131,072 |
Hosted domains
There are 17 domain names hosted across 15 IP addresses on this ASN. Checkout our API to access full domain hosting information.
| IP Address | Domain | Domains on this IP |
|---|---|---|
| 121.251.88.107 | wjut.edu.cn | 1 |
| 121.251.136.143 | qit.edu.cn | 1 |
| 121.251.32.1 | ahgm.edu.cn | 1 |
| 121.250.180.20 | wenrui.work | 1 |
Hosted domains API
Pingable IPs
377 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.250.51.6 |
5.99ms from Qingdao,
CN
|
|
| 121.250.108.99 |
5.84ms from Qingdao,
CN
|
|
| 121.250.24.1 |
9.53ms from Qingdao,
CN
|
|
| 121.250.15.255 |
11.30ms from Qingdao,
CN
|
|
| 121.251.24.11 |
11.26ms from Shanghai,
CN
|
|
| 121.251.89.103 |
13.68ms from Shanghai,
CN
|
|
| 121.251.52.16 |
14.32ms from Shanghai,
CN
|
|
| 121.251.27.254 |
10.36ms from Shanghai,
CN
|
|
| 121.250.200.156 |
13.37ms from Qingdao,
CN
|
|
| 121.250.233.198 |
6.25ms from Qingdao,
CN
|
|
| 121.251.4.1 |
11.02ms from Shanghai,
CN
|
|
| 121.251.0.10 |
13.58ms from Shanghai,
CN
|
|
| 121.250.18.60 |
6.80ms from Qingdao,
CN
|
|
| 121.251.30.100 |
19.10ms from Shanghai,
CN
|
|
| 121.251.210.1 |
1.64ms from Qingdao,
CN
|
|
| 121.251.128.124 |
9.84ms from Qingdao,
CN
|
|
| 121.251.192.8 |
13.61ms from Qingdao,
CN
|
|
| 121.250.30.1 |
8.98ms from Qingdao,
CN
|
|
| 121.251.26.26 |
13.01ms from Shanghai,
CN
|
|
| 121.251.232.197 |
3.03ms from Qingdao,
CN
|
|
| 121.250.80.25 |
8.72ms from Qingdao,
CN
|
|
| 121.251.17.1 |
11.39ms from Shanghai,
CN
|
|
| 121.250.23.9 |
6.67ms from Qingdao,
CN
|
|
| 121.251.193.9 |
16.52ms from Qingdao,
CN
|
|
| 121.250.58.2 |
7.83ms 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 |
|---|---|---|
| 219.236.40.111 |
9.49ms from Beijing,
CN
|
|
| 111.167.123.175 |
7.87ms from Beijing,
CN
|
|
| 194.49.101.127 |
5.02ms from Berlin,
DE
|
|
| 174.162.57.143 |
9.98ms from Chicago,
US
|
|
| 73.50.131.47 |
5.91ms from Chicago,
US
|
|
| 34.170.237.15 |
0.13ms from Council Bluffs,
US
|
|
| 218.250.195.143 |
5.12ms from Hong Kong,
HK
|
|
| 94.250.57.255 |
8.97ms from Ljubljana,
SI
|
|
| 49.73.114.255 |
5.40ms from Nanjing,
CN
|
|
| 90.93.245.143 |
10.81ms from Paris,
FR
|
|
| 34.197.239.31 |
0.18ms from Reston,
US
|
|
| 2.90.56.143 |
3.41ms from Riyadh,
SA
|
|
| 47.116.178.255 |
2.49ms from Shanghai,
CN
|
|
| 142.120.70.239 |
1.71ms from Toronto,
CA
|
|
| 105.99.239.223 |
8.94ms from Valencia,
ES
|
|
| 42.237.7.255 |
9.22ms from Zhengzhou,
CN
|
|
| 72.84.244.111 |
4.81ms from Ashburn,
US
|
|
| 138.73.145.95 |
13.43ms from Beauharnois,
CA
|
|
| 93.237.15.191 |
5.68ms from Frankfurt am Main,
DE
|
|
| 187.228.60.191 |
0.91ms from Guadalajara,
MX
|
|
| 222.84.195.255 |
15.65ms from Guiyang,
CN
|
|
| 87.234.249.191 |
2.91ms from Hamburg,
DE
|
|
| 45.149.68.159 |
1.06ms from Hong Kong,
HK
|
|
| 120.142.59.15 |
2.09ms from Seoul,
KR
|
|
| 125.191.147.143 |
6.11ms from Seoul,
KR
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Lima, PE
What are IP address ranges?
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