121.248.112.0/21
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 121.248.112.0/21
| 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 121.248.0.0/16
| Range | ASN | Company | Num of IPs |
|---|---|---|---|
| 121.248.0.0/14 | AS4538 | China Education and Research Network | 262,144 |
Hosted domains
There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.
| IP Address | Domain | Domains on this IP |
|---|---|---|
| 121.248.112.1 | lygtc.edu.cn | 1 |
Hosted domains API
Pingable IPs
39 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.248.114.4 |
9.26ms from Shanghai,
CN
|
|
| 121.248.112.1 |
16.39ms from Shanghai,
CN
|
|
| 121.248.113.1 |
17.03ms from Shanghai,
CN
|
|
| 121.248.115.2 |
16.68ms from Shanghai,
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 |
|---|---|---|
| 3.213.93.133 |
0.51ms from Ashburn,
US
|
|
| 98.80.135.149 |
0.73ms from Ashburn,
US
|
|
| 100.30.183.229 |
0.93ms from Ashburn,
US
|
|
| 8.131.85.53 |
2.08ms from Beijing,
CN
|
|
| 34.30.52.21 |
0.12ms from Council Bluffs,
US
|
|
| 201.192.239.245 |
0.90ms from Curridabat,
CR
|
|
| 77.227.243.245 |
15.85ms from Madrid,
ES
|
|
| 1.43.193.85 |
2.97ms from Melbourne,
AU
|
|
| 46.34.135.37 |
1.37ms from Moscow,
RU
|
|
| 47.20.19.21 |
7.11ms from New York City,
US
|
|
| 187.48.115.197 |
4.82ms from Osasco,
BR
|
|
| 46.60.2.149 |
0.82ms from Ramallah,
PS
|
|
| 187.136.9.165 |
17.48ms from Santiago de Queretaro,
MX
|
|
| 177.185.13.37 |
1.60ms from Sao Paulo,
BR
|
|
| 184.24.250.149 |
0.07ms from Sydney,
AU
|
|
| 34.83.38.197 |
0.14ms from The Dalles,
US
|
|
| 126.115.34.197 |
5.06ms from Tokyo,
JP
|
|
| 114.141.123.69 |
0.74ms from Tokyo,
JP
|
|
| 218.206.239.69 |
3.22ms from Zhengzhou,
CN
|
|
| 20.31.112.149 |
0.23ms from Amsterdam,
NL
|
|
| 91.3.240.53 |
2.06ms from Berlin,
DE
|
|
| 190.252.111.229 |
1.54ms from Bogota,
CO
|
|
| 45.71.183.133 |
10.78ms from Bogotá,
CO
|
|
| 45.16.161.245 |
6.88ms from Chicago,
US
|
|
| 108.198.192.149 |
16.80ms from Dallas,
US
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Helsinki, FI
What are IP address ranges?
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