121.250.24.0/21
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 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: 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 121.250.24.0/21
| 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
9 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.250.24.1 |
9.42ms from Qingdao,
CN
|
|
| 121.250.28.1 |
8.44ms from Qingdao,
CN
|
|
| 121.250.30.63 |
8.77ms from Qingdao,
CN
|
|
| 121.250.27.129 |
6.63ms 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 |
|---|---|---|
| 62.149.199.101 |
0.25ms from Arezzo,
IT
|
|
| 50.230.36.5 |
1.68ms from Atlanta,
US
|
|
| 181.110.71.69 |
8.61ms from Buenos Aires,
AR
|
|
| 190.89.154.133 |
0.86ms from Fortaleza,
BR
|
|
| 98.38.61.149 |
4.78ms from Greenwood Village,
US
|
|
| 120.237.177.37 |
6.04ms from Guangzhou,
CN
|
|
| 114.237.111.229 |
8.75ms from Huai'an,
CN
|
|
| 111.17.188.85 |
9.39ms from Jinan,
CN
|
|
| 194.179.87.181 |
1.49ms from Madrid,
ES
|
|
| 84.120.245.117 |
9.62ms from Madrid,
ES
|
|
| 68.200.99.69 |
5.56ms from Orlando,
US
|
|
| 97.104.68.197 |
10.10ms from Orlando,
US
|
|
| 177.95.78.181 |
2.48ms from Osasco,
BR
|
|
| 204.10.62.5 |
1.19ms from Piscataway,
US
|
|
| 78.156.143.229 |
1.90ms from Prague,
CZ
|
|
| 136.152.79.229 |
4.87ms from San Jose,
US
|
|
| 112.157.179.133 |
1.95ms from Seoul,
KR
|
|
| 114.182.90.85 |
8.27ms from Tokyo,
JP
|
|
| 5.185.246.85 |
14.45ms from Warsaw,
PL
|
|
| 44.200.150.197 |
0.72ms from Ashburn,
US
|
|
| 201.45.131.229 |
0.35ms from Brasilia,
BR
|
|
| 210.18.32.101 |
7.25ms from Chennai,
IN
|
|
| 200.141.193.117 |
8.07ms from Fortaleza,
BR
|
|
| 178.30.206.37 |
14.49ms from Goeteborg,
SE
|
|
| 195.23.112.181 |
15.05ms from Lisbon,
PT
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Seoul, KR
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