121.250.0.0/20
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 Research Center, address: Main Bldg, 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: http://www.ccert.edu.cn remarks: abuse@cernet.edu.cn was validated on 2025-08-15 mnt-by: MAINT-CERNET-AP last-modified: 2025-11-18T00:26:28Z source: APNIC role: ABUSE CERNETAP country: ZZ address: Network Research Center, address: Main Bldg, 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 2025-08-15 abuse-mailbox: abuse@cernet.edu.cn mnt-by: APNIC-ABUSE last-modified: 2025-08-15T09:38:28Z 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 121.250.0.0/20
| 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 |
|---|---|---|
| 121.250.15.255 |
11.30ms from Qingdao,
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 |
|---|---|---|
| 72.77.83.84 |
6.55ms from Ashburn,
US
|
|
| 3.19.196.148 |
0.19ms from Columbus,
US
|
|
| 35.238.105.148 |
0.11ms from Council Bluffs,
US
|
|
| 34.67.159.196 |
0.12ms from Council Bluffs,
US
|
|
| 86.150.219.116 |
2.25ms from Erith,
GB
|
|
| 31.111.113.36 |
1.25ms from Erith,
GB
|
|
| 222.171.72.116 |
14.57ms from Harbin,
CN
|
|
| 1.59.130.36 |
6.00ms from Harbin,
CN
|
|
| 103.140.73.180 |
0.11ms from Indore,
IN
|
|
| 185.239.35.132 |
0.87ms from London,
GB
|
|
| 217.42.73.84 |
8.51ms from London,
GB
|
|
| 38.48.223.132 |
0.28ms from Los Angeles,
US
|
|
| 216.155.1.164 |
0.16ms from Miami,
US
|
|
| 86.238.152.100 |
2.69ms from Paris,
FR
|
|
| 20.150.165.196 |
0.25ms from Phoenix,
US
|
|
| 221.140.28.212 |
1.87ms from Seoul,
KR
|
|
| 34.118.33.116 |
0.11ms from Warsaw,
PL
|
|
| 20.73.151.52 |
0.23ms from Amsterdam,
NL
|
|
| 121.75.190.180 |
6.30ms from Auckland,
NZ
|
|
| 111.197.99.244 |
4.22ms from Beijing,
CN
|
|
| 1.28.58.84 |
3.14ms from Hohhot,
CN
|
|
| 103.149.152.132 |
0.41ms from Hong Kong,
HK
|
|
| 88.250.70.228 |
9.81ms from Izmir,
TR
|
|
| 85.52.62.52 |
7.86ms from Madrid,
ES
|
|
| 98.232.139.52 |
3.18ms from Portland,
US
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in Lima, PE
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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