121.249.216.0/21
AS4538 · China Education and Research Network Center
Need more data or want to access it via API or data downloads? Sign up to get free access
Sign up for free ›Summary
| 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: [email protected] abuse-mailbox: [email protected] admin-c: CER-AP tech-c: CER-AP auth: # Filtered remarks: timezone GMT+8 remarks: http://www.ccert.edu.cn remarks: [email protected] 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: [email protected] admin-c: CER-AP tech-c: CER-AP nic-hdl: AC1685-AP remarks: Generated from irt object IRT-CERNET-AP remarks: [email protected] was validated on 2025-08-15 abuse-mailbox: [email protected] 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: [email protected] remarks: [email protected] 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 121.249.216.0/21
| 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 121.249.0.0/16
| 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 |
|---|---|---|
| 69.61.161.101 |
0.68ms from Cincinnati,
US
|
|
| 39.40.133.5 |
17.98ms from Lahore,
PK
|
|
| 79.224.26.133 |
4.94ms from Nuernberg,
DE
|
|
| 83.18.71.165 |
5.92ms from Poznan,
PL
|
|
| 88.101.167.21 |
4.29ms from Prague,
CZ
|
|
| 162.17.171.37 |
9.23ms from Seattle,
US
|
|
| 49.167.73.133 |
2.86ms from Seoul,
KR
|
|
| 12.70.10.245 |
12.90ms from Atlanta,
US
|
|
| 94.101.37.5 |
4.93ms from Berlin,
DE
|
|
| 35.155.141.181 |
0.17ms from Boardman,
US
|
|
| 84.90.166.37 |
7.20ms from Braga,
PT
|
|
| 190.138.7.117 |
16.40ms from Buenos Aires,
AR
|
|
| 35.225.73.69 |
0.10ms from Council Bluffs,
US
|
|
| 18.154.251.229 |
0.28ms from Dallas,
US
|
|
| 34.242.124.117 |
0.17ms from Dublin,
IE
|
|
| 5.61.90.101 |
5.88ms from Helsinki,
FI
|
|
| 94.153.201.149 |
6.03ms from Kyiv,
UA
|
|
| 176.37.125.69 |
0.49ms from Kyiv,
UA
|
|
| 23.105.154.245 |
1.05ms from New York City,
US
|
|
| 180.144.81.117 |
1.59ms from Osaka,
JP
|
|
| 177.129.177.229 |
8.89ms from Sao Paulo,
BR
|
|
| 106.10.65.21 |
1.07ms from Seoul,
KR
|
|
| 14.43.30.165 |
6.70ms from Seoul,
KR
|
|
| 176.230.14.37 |
3.83ms from Tel Aviv,
IL
|
|
| 37.235.113.37 |
0.54ms from Amsterdam,
NL
|
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?
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.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.
An API built with users in mind: reliable, accurate, and easy-to-use
Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.
Our IP tools
Explore all tools
Summarize IPs
Use our data visualization tool to create a visual overview of multiple IPs.
Try Summarize IPs