121.250.128.0/20
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 121.250.128.0/20
| 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
1 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.250.130.2 |
9.52ms from Beijing,
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 |
|---|---|---|
| 110.224.141.4 |
2.73ms from Ahmedabad,
IN
|
|
| 105.105.120.244 |
15.14ms from Algiers,
DZ
|
|
| 44.209.138.68 |
0.50ms from Ashburn,
US
|
|
| 70.161.209.4 |
9.04ms from Ashburn,
US
|
|
| 64.130.189.36 |
9.82ms from Atlanta,
US
|
|
| 54.68.249.68 |
0.17ms from Boardman,
US
|
|
| 174.170.207.228 |
4.31ms from Houston,
US
|
|
| 75.157.115.132 |
1.85ms from Kelowna,
CA
|
|
| 77.120.117.20 |
0.43ms from Kyiv,
UA
|
|
| 174.54.60.36 |
17.73ms from Manassas,
US
|
|
| 90.66.98.20 |
6.98ms from Marseille,
FR
|
|
| 35.227.198.4 |
0.07ms from Melbourne,
AU
|
|
| 172.100.176.116 |
17.78ms from New York City,
US
|
|
| 84.150.91.84 |
4.62ms from Nuernberg,
DE
|
|
| 15.165.227.132 |
0.19ms from Seoul,
KR
|
|
| 115.0.234.180 |
1.85ms from Seoul,
KR
|
|
| 208.85.72.4 |
1.43ms from St. Louis,
US
|
|
| 203.173.224.4 |
14.22ms from Auckland,
NZ
|
|
| 40.38.3.148 |
0.26ms from Boardman,
US
|
|
| 191.104.140.84 |
3.55ms from Bogota,
CO
|
|
| 220.166.247.196 |
4.02ms from Chengdu,
CN
|
|
| 65.25.9.180 |
8.96ms from Columbus,
US
|
|
| 52.14.106.52 |
0.14ms from Columbus,
US
|
|
| 87.252.222.228 |
0.72ms from Dublin,
IE
|
|
| 210.100.160.4 |
1.43ms from Incheon,
KR
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Hong Kong, HK
What are IP address ranges?
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