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 | 121.250.0.0/15 |
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 2025-01-22 mnt-by: MAINT-CERNET-AP last-modified: 2025-01-22T13:47:43Z 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 2025-01-22 abuse-mailbox: abuse@cernet.edu.cn mnt-by: APNIC-ABUSE last-modified: 2025-01-22T16:25:45Z 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 |
---|---|---|---|
121.250.0.0/15 | AS4538 | China Education and Research Network | 131,072 |
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 |
121.250.0.0/15 | AS4538 | China Education and Research Network | 131,072 |
121.251.0.0/20 | AS24362 | China Education and Research Network | 4,096 |
121.251.192.0/20 | AS24363 | China Education and Research Network | 4,096 |
121.251.0.0/20 | AS4538 | China Education and Research Network | 4,096 |
121.251.176.0/20 | AS24363 | China Education and Research Network | 4,096 |
121.251.176.0/20 | AS4538 | China Education and Research Network | 4,096 |
121.251.160.0/20 | AS4538 | China Education and Research Network | 4,096 |
121.251.160.0/20 | AS24363 | China Education and Research Network | 4,096 |
121.251.64.0/20 | AS24362 | China Education and Research Network | 4,096 |
121.251.64.0/20 | AS4538 | China Education and Research Network | 4,096 |
121.251.240.0/20 | AS132553 | China Education and Research Network | 4,096 |
121.251.240.0/20 | AS4538 | China Education and Research Network | 4,096 |
121.251.144.0/20 | AS4538 | China Education and Research Network | 4,096 |
121.251.144.0/20 | AS24363 | China Education and Research Network | 4,096 |
121.251.224.0/20 | AS4538 | China Education and Research Network | 4,096 |
121.251.224.0/20 | AS138371 | China Education and Research Network | 4,096 |
121.251.192.0/20 | AS4538 | China Education and Research Network | 4,096 |
121.251.16.0/21 | AS24362 | China Education and Research Network | 2,048 |
121.251.88.0/21 | AS4538 | China Education and Research Network | 2,048 |
121.251.88.0/21 | AS24362 | China Education and Research Network | 2,048 |
121.251.208.0/21 | AS4538 | China Education and Research Network | 2,048 |
121.251.208.0/21 | AS138371 | China Education and Research Network | 2,048 |
121.251.16.0/21 | AS4538 | China Education and Research Network | 2,048 |
121.251.216.0/21 | AS138371 | China Education and Research Network | 2,048 |
121.251.216.0/21 | AS4538 | China Education and Research Network | 2,048 |
121.251.136.0/21 | AS138371 | China Education and Research Network | 2,048 |
121.251.136.0/21 | AS4538 | China Education and Research Network | 2,048 |
121.251.128.0/22 | AS4538 | China Education and Research Network | 1,024 |
121.251.132.0/22 | AS24363 | China Education and Research Network | 1,024 |
121.251.132.0/22 | AS4538 | China Education and Research Network | 1,024 |
121.251.128.0/22 | AS24363 | China Education and Research Network | 1,024 |
121.251.32.0/22 | AS4538 | China Education and Research Network | 1,024 |
121.251.32.0/22 | AS24362 | China Education and Research Network | 1,024 |
121.251.24.0/23 | AS4538 | China Education and Research Network | 512 |
121.251.50.0/23 | AS4538 | China Education and Research Network | 512 |
121.251.28.0/23 | AS24362 | China Education and Research Network | 512 |
121.251.48.0/23 | AS24362 | China Education and Research Network | 512 |
121.251.48.0/23 | AS4538 | China Education and Research Network | 512 |
121.251.28.0/23 | AS4538 | China Education and Research Network | 512 |
121.251.56.0/23 | AS24362 | China Education and Research Network | 512 |
121.251.56.0/23 | AS4538 | China Education and Research Network | 512 |
121.251.50.0/23 | AS24362 | China Education and Research Network | 512 |
121.251.24.0/23 | AS24362 | China Education and Research Network | 512 |
121.251.52.0/24 | AS24362 | China Education and Research Network | 256 |
121.251.52.0/24 | AS4538 | China Education and Research Network | 256 |
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 | 10.88ms from Shanghai, CN | |
121.251.26.27 | 12.54ms 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 |
---|---|---|
24.131.199.7 | 10.87ms from Ashburn, US | |
161.199.23.23 | 1.34ms from Atlanta, US | |
178.169.153.151 | 4.71ms from Sofia, BG | |
173.241.104.183 | 5.25ms from Toronto, CA | |
192.243.111.215 | 0.30ms from Dallas, US | |
61.174.179.87 | 9.26ms from Hangzhou, CN | |
82.180.43.151 | 1.80ms from Milan, IT | |
212.33.26.215 | 1.09ms from Moscow, RU | |
44.241.147.39 | 0.15ms from Boardman, US | |
104.190.27.135 | 1.94ms from Houston, US | |
162.214.61.39 | 15.07ms from Los Angeles, US | |
71.232.127.151 | 8.84ms from Boston, US | |
60.35.49.87 | 3.68ms from Tokyo, JP | |
135.131.78.7 | 10.40ms from Atlanta, US | |
3.142.123.103 | 0.66ms from Columbus, US | |
5.12.143.231 | 0.87ms from Bucharest, RO | |
173.94.197.167 | 11.24ms from Charlotte, US | |
87.21.176.247 | 12.24ms from Milan, IT | |
62.245.139.55 | 0.65ms from Munich, DE | |
146.121.23.71 | 2.25ms from Secaucus, US | |
101.31.73.231 | 12.05ms from Tianjin, CN | |
199.96.46.135 | 3.52ms from Ashburn, US | |
39.176.131.55 | 14.72ms from Changsha, CN | |
202.203.187.39 | 19.20ms from Chengdu, CN | |
78.105.215.183 | 4.02ms from London, GB |
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.
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