121.248.64.0/21
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: 121.250.0.0/15 descr: CERNET origin: AS4538 mnt-by: MAINT-CERNET-AP last-modified: 2009-01-05T03:10:57Z source: APNIC
Overlapping Ranges
BGP prefixes that contain 121.248.64.0/21
| 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 are no domains currently hosted on this ASN.
Hosted domains API
Pingable IPs
12 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.248.67.2 |
18.70ms from Hangzhou,
CN
|
|
| 121.248.70.62 |
18.68ms from Hangzhou,
CN
|
|
| 121.248.64.135 |
14.21ms 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 |
|---|---|---|
| 20.46.52.181 |
4.02ms from Al Fujairah City,
AE
|
|
| 3.85.1.5 |
0.50ms from Ashburn,
US
|
|
| 73.143.172.21 |
8.32ms from Boston,
US
|
|
| 136.232.221.165 |
2.16ms from Chennai,
IN
|
|
| 3.128.164.229 |
0.18ms from Columbus,
US
|
|
| 93.198.254.229 |
4.30ms from Frankfurt am Main,
DE
|
|
| 130.83.58.53 |
1.05ms from Frankfurt am Main,
DE
|
|
| 35.176.138.245 |
0.17ms from London,
GB
|
|
| 78.146.200.165 |
3.83ms from Manchester,
GB
|
|
| 79.44.229.197 |
2.93ms from Milan,
IT
|
|
| 207.248.61.213 |
4.20ms from Monterrey,
MX
|
|
| 61.246.197.5 |
0.89ms from Mumbai,
IN
|
|
| 219.75.183.117 |
2.61ms from Osaka,
JP
|
|
| 122.32.19.101 |
2.01ms from Seoul,
KR
|
|
| 217.25.32.5 |
1.39ms from Stockholm,
SE
|
|
| 139.130.155.85 |
0.50ms from Sydney,
AU
|
|
| 218.171.88.197 |
4.79ms from Taichung,
TW
|
|
| 111.173.92.213 |
7.29ms from Wuhan,
CN
|
|
| 188.225.1.5 |
15.11ms from Yekaterinburg,
RU
|
|
| 137.27.56.69 |
18.02ms from Atlanta,
US
|
|
| 90.64.229.101 |
0.46ms from Bratislava,
SK
|
|
| 63.33.176.117 |
0.20ms from Dublin,
IE
|
|
| 182.40.30.37 |
5.48ms from Jinan,
CN
|
|
| 102.207.236.69 |
7.10ms from Johannesburg,
ZA
|
|
| 37.37.236.229 |
7.79ms from Kuwait City,
KW
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Seoul, KR
What are IP address ranges?
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