121.251.26.0/23
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 121.251.26.0/23
| 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 121.251.0.0/16
| 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
4 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 121.251.27.254 |
11.63ms from Shanghai,
CN
|
|
| 121.251.26.27 |
12.69ms 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 |
|---|---|---|
| 34.217.10.135 |
0.15ms from Boardman,
US
|
|
| 34.58.11.103 |
0.11ms from Council Bluffs,
US
|
|
| 24.55.6.151 |
10.54ms from Houston,
US
|
|
| 209.59.135.23 |
0.31ms from Lansing,
US
|
|
| 98.40.41.247 |
12.94ms from Murfreesboro,
US
|
|
| 98.84.184.55 |
0.20ms from Reston,
US
|
|
| 110.45.64.87 |
12.79ms from Seoul,
KR
|
|
| 103.212.244.7 |
1.05ms from Seoul,
KR
|
|
| 119.215.79.183 |
1.76ms from Seoul,
KR
|
|
| 143.189.82.167 |
3.13ms from Tokyo,
JP
|
|
| 51.105.156.119 |
0.25ms from Amsterdam,
NL
|
|
| 13.82.84.87 |
0.45ms from Ashburn,
US
|
|
| 62.54.168.7 |
0.50ms from Berlin,
DE
|
|
| 105.197.160.119 |
10.60ms from Cairo,
EG
|
|
| 162.58.36.55 |
9.88ms from Dallas,
US
|
|
| 84.166.94.167 |
3.25ms from Duesseldorf,
DE
|
|
| 78.48.81.39 |
3.29ms from Duesseldorf,
DE
|
|
| 88.206.249.183 |
3.85ms from Goeteborg,
SE
|
|
| 76.83.200.247 |
5.42ms from Honolulu,
US
|
|
| 208.163.62.183 |
1.01ms from Kingston,
JM
|
|
| 49.85.215.167 |
5.44ms from Nanjing,
CN
|
|
| 4.71.185.71 |
2.09ms from New York City,
US
|
|
| 202.248.151.135 |
2.03ms from Osaka,
JP
|
|
| 90.91.219.71 |
1.38ms from Paris,
FR
|
|
| 54.236.207.199 |
0.20ms from Reston,
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?
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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