121.251.28.0/23
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 121.251.28.0/23
| 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 121.251.0.0/16
| 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
No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
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 |
|---|---|---|
| 129.149.16.39 |
0.15ms from Cardiff,
GB
|
|
| 124.156.122.231 |
0.71ms from Hong Kong,
HK
|
|
| 87.90.14.247 |
4.36ms from Marseille,
FR
|
|
| 62.35.34.7 |
2.81ms from Paris,
FR
|
|
| 211.194.247.71 |
5.15ms from Seoul,
KR
|
|
| 209.227.215.7 |
0.21ms from Arezzo,
IT
|
|
| 79.194.61.199 |
1.73ms from Berlin,
DE
|
|
| 59.163.241.55 |
0.86ms from Chennai,
IN
|
|
| 174.101.20.23 |
15.07ms from Cleveland,
US
|
|
| 35.238.194.71 |
0.14ms from Council Bluffs,
US
|
|
| 35.157.188.23 |
0.16ms from Frankfurt am Main,
DE
|
|
| 113.177.56.247 |
3.09ms from Hanoi,
VN
|
|
| 176.147.101.199 |
2.85ms from Marseille,
FR
|
|
| 151.67.114.151 |
8.80ms from Milan,
IT
|
|
| 77.51.46.119 |
1.44ms from Moscow,
RU
|
|
| 24.188.101.55 |
8.84ms from New York City,
US
|
|
| 86.215.74.103 |
11.08ms from Paris,
FR
|
|
| 52.247.223.151 |
0.35ms from Quincy,
US
|
|
| 98.35.34.231 |
5.38ms from Santa Clara,
US
|
|
| 24.84.45.135 |
7.36ms from Seattle,
US
|
|
| 23.40.126.199 |
0.48ms from Stockholm,
SE
|
|
| 101.31.154.7 |
7.85ms from Beijing,
CN
|
|
| 68.97.47.151 |
8.33ms from Dallas,
US
|
|
| 113.186.18.151 |
2.31ms from Hanoi,
VN
|
|
| 90.192.68.103 |
3.63ms from London,
GB
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Lille, FR
What are IP address ranges?
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