121.250.32.0/20
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: 121.250.0.0/15 descr: CERNET origin: AS4538 mnt-by: MAINT-CERNET-AP last-modified: 2009-01-05T03:10:57Z source: APNIC
Overlapping Ranges
BGP prefixes that contain 121.250.32.0/20
| 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
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 |
|---|---|---|
| 177.17.171.228 |
1.91ms from Brasilia,
BR
|
|
| 158.247.186.212 |
11.26ms from Chicago,
US
|
|
| 74.46.26.52 |
13.74ms from Chicago,
US
|
|
| 75.210.201.132 |
8.52ms from Chicago,
US
|
|
| 171.249.50.148 |
2.56ms from Ho Chi Minh City,
VN
|
|
| 92.132.120.4 |
8.26ms from Lyon,
FR
|
|
| 158.158.119.68 |
0.23ms from Madrid,
ES
|
|
| 13.234.102.4 |
0.15ms from Mumbai,
IN
|
|
| 107.89.2.20 |
16.88ms from New York City,
US
|
|
| 111.169.73.100 |
2.00ms from Osaka,
JP
|
|
| 44.212.172.180 |
0.16ms from Reston,
US
|
|
| 179.106.144.4 |
8.61ms from Rio de Janeiro,
BR
|
|
| 107.3.64.244 |
2.92ms from Salt Lake City,
US
|
|
| 39.170.167.52 |
5.29ms from Suzhou,
CN
|
|
| 222.139.171.116 |
3.05ms from Zhengzhou,
CN
|
|
| 4.180.156.68 |
0.29ms from Amsterdam,
NL
|
|
| 109.138.18.228 |
2.21ms from Brussels,
BE
|
|
| 91.178.90.244 |
3.34ms from Brussels,
BE
|
|
| 47.46.45.20 |
15.93ms from Chicago,
US
|
|
| 51.199.139.84 |
1.31ms from Dublin,
IE
|
|
| 40.142.41.100 |
1.49ms from Durham,
US
|
|
| 149.81.84.244 |
0.46ms from Frankfurt am Main,
DE
|
|
| 183.56.253.36 |
2.28ms from Guangzhou,
CN
|
|
| 97.220.224.132 |
15.93ms from Miami,
US
|
|
| 180.140.5.148 |
3.30ms from Nanning,
CN
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Seattle, US
What are IP address ranges?
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
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