121.250.224.0/21
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 Center, address: FIT-3-220, 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: abuse@cernet.edu.cn was validated on 2026-03-05 mnt-by: MAINT-CERNET-AP last-modified: 2026-03-05T06:39:56Z source: APNIC role: ABUSE CERNETAP country: ZZ address: Network Center, address: FIT-3-220, 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 2026-03-05 abuse-mailbox: abuse@cernet.edu.cn mnt-by: APNIC-ABUSE last-modified: 2026-03-05T06:40:20Z 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: 121.248.0.0/15 descr: CERNET origin: AS4538 mnt-by: MAINT-CERNET-AP last-modified: 2009-01-05T03:10:57Z source: APNIC
Overlapping Ranges
BGP prefixes that contain 121.250.224.0/21
| 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 121.250.0.0/16
| Range | ASN | Company | Num of IPs |
|---|---|---|---|
| 121.248.0.0/14 | AS4538 | China Education and Research Network | 262,144 |
Hosted domains
There are no domains currently hosted on this ASN.
Hosted domains API
Pingable IPs
2,048 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.250.226.211 |
5.94ms from Qingdao,
CN
|
|
| 121.250.224.214 |
5.88ms from Qingdao,
CN
|
|
| 121.250.231.143 |
5.99ms from Qingdao,
CN
|
|
| 121.250.228.217 |
5.85ms from Qingdao,
CN
|
|
| 121.250.230.243 |
5.92ms from Qingdao,
CN
|
|
| 121.250.225.47 |
5.84ms from Qingdao,
CN
|
|
| 121.250.229.161 |
5.92ms from Qingdao,
CN
|
|
| 121.250.227.99 |
5.98ms 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 |
|---|---|---|
| 93.126.140.37 |
8.05ms from Beirut,
LB
|
|
| 190.249.175.197 |
5.88ms from Bogota,
CO
|
|
| 37.17.169.133 |
0.31ms from Budapest,
HU
|
|
| 58.21.194.53 |
4.58ms from Changchun,
CN
|
|
| 188.185.131.197 |
0.91ms from Geneve,
CH
|
|
| 109.87.180.245 |
6.43ms from Kyiv,
UA
|
|
| 81.105.190.85 |
8.27ms from London,
GB
|
|
| 173.46.162.5 |
5.74ms from Miami,
US
|
|
| 78.4.115.69 |
5.86ms from Milan,
IT
|
|
| 65.92.180.69 |
4.03ms from Montreal,
CA
|
|
| 210.235.149.37 |
9.49ms from Osaka,
JP
|
|
| 90.102.40.149 |
1.63ms from Paris,
FR
|
|
| 45.175.81.245 |
12.83ms from Sao Jose do Rio Preto,
BR
|
|
| 216.26.241.213 |
0.13ms from Toronto,
CA
|
|
| 80.121.224.21 |
1.00ms from Vienna,
AT
|
|
| 60.25.51.85 |
5.04ms from Beijing,
CN
|
|
| 71.181.0.149 |
3.11ms from Boston,
US
|
|
| 177.66.163.165 |
0.75ms from Curitiba,
BR
|
|
| 107.218.138.213 |
6.70ms from Dallas,
US
|
|
| 3.121.207.5 |
0.18ms from Frankfurt am Main,
DE
|
|
| 118.178.68.197 |
4.68ms from Hangzhou,
CN
|
|
| 116.111.128.181 |
17.68ms from Ho Chi Minh City,
VN
|
|
| 109.75.206.21 |
17.22ms from Moscow,
RU
|
|
| 117.212.182.5 |
6.93ms from Mumbai,
IN
|
|
| 112.121.220.133 |
6.63ms 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 Beijing, CN
What are IP address ranges?
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