211.81.0.0/17
AS4538 · China Education and Research Network Center
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| Country |
China
|
| Domain | cernet.edu.cn |
| ASN | AS4538 |
| Registry | APNIC |
| ID | CERNET-CN |
WHOIS Details
inetnum: 211.81.0.0 - 211.82.255.255 netname: CERNET-CN descr: China Education and Research Network descr: Beijing Regional Network country: CN admin-c: JW1-CN tech-c: XL1-CN tech-c: SZ2-AP abuse-c: AC1685-AP status: ALLOCATED PORTABLE mnt-by: APNIC-HM mnt-lower: MAINT-CERNET-AP mnt-routes: MAINT-CERNET-AP mnt-irt: IRT-CERNET-AP last-modified: 2020-10-20T00:56:14Z 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 person: Jianping Wu address: China Education and Research Network Center address: Room 225, Main Building, Tsinghua University address: Beijing 100084 address: CN country: CN phone: +86-10-6278-5983 fax-no: +86-10-6278-5933 e-mail: jianping@cernet.edu.cn nic-hdl: JW1-CN mnt-by: MAINT-CERNET-AP last-modified: 2011-12-22T05:14:25Z source: APNIC person: Shuang Zhu address: China Education and Research Network Information Center address: Room 225, Main Building, Tsinghua University address: Beijing 100084, China country: CN phone: +86-10-6278-5931 fax-no: +86-10-6278-5933 e-mail: szhu@cernet.edu.cn nic-hdl: SZ2-AP mnt-by: MAINT-CERNET-AP last-modified: 2011-12-22T05:14:36Z source: APNIC person: Xing Li address: China Education and Research Network Center address: Room 225, Main Building, Tsinghua University address: Beijing 100084 address: CN country: CN phone: +86-10-6278-5983 fax-no: +86-10-6278-5933 e-mail: xing@cernet.edu.cn nic-hdl: XL1-CN mnt-by: MAINT-CERNET-AP last-modified: 2011-12-22T05:14:25Z source: APNIC
Hosted domains
There are 5 domain names hosted across 5 IP addresses on this ASN. Checkout our API to access full domain hosting information.
| IP Address | Domain | Domains on this IP |
|---|---|---|
| 211.81.36.3 | xn--fiqv8jw4h1r3b.xn--fiqs8s | 1 |
Hosted domains API
Pingable IPs
30 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.
| IP Address | ASN | Details |
|---|---|---|
| 211.81.42.50 |
4.90ms from Beijing,
CN
|
|
| 211.81.60.5 |
5.75ms from Tianjin,
CN
|
|
| 211.81.31.1 |
5.10ms from Beijing,
CN
|
|
| 211.81.41.1 |
6.46ms from Beijing,
CN
|
|
| 211.81.43.253 |
7.23ms from Beijing,
CN
|
|
| 211.81.40.121 |
5.76ms from Beijing,
CN
|
|
| 211.81.96.33 |
18.73ms from Beijing,
CN
|
|
| 211.81.20.201 |
4.13ms from Beijing,
CN
|
|
| 211.81.72.254 |
27.66ms from Beijing,
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 |
|---|---|---|
| 122.199.35.33 |
1.27ms from Adelaide,
AU
|
|
| 86.108.49.1 |
0.77ms from Amman,
JO
|
|
| 145.109.44.1 |
0.56ms from Amsterdam,
NL
|
|
| 98.190.242.49 |
6.05ms from Ashburn,
US
|
|
| 71.115.47.1 |
9.27ms from Ashburn,
US
|
|
| 12.97.29.1 |
3.17ms from Ashburn,
US
|
|
| 62.225.148.129 |
1.60ms from Berlin,
DE
|
|
| 198.7.248.1 |
2.75ms from Boston,
US
|
|
| 78.178.167.1 |
12.46ms from Bursa,
TR
|
|
| 130.94.49.1 |
0.60ms from Cairo,
EG
|
|
| 75.158.20.1 |
0.88ms from Calgary,
CA
|
|
| 45.230.168.1 |
0.59ms from Caracas,
VE
|
|
| 175.19.168.17 |
1.70ms from Changchun,
CN
|
|
| 221.8.164.1 |
2.37ms from Changchun,
CN
|
|
| 216.99.173.1 |
1.60ms from Chicago,
US
|
|
| 12.175.21.241 |
3.82ms from Chicago,
US
|
|
| 186.64.213.1 |
2.42ms from Curridabat,
CR
|
|
| 216.146.16.1 |
0.15ms from Dallas,
US
|
|
| 4.4.195.81 |
0.20ms from Denver,
US
|
|
| 192.145.11.1 |
0.45ms from Frankfurt am Main,
DE
|
|
| 46.223.174.1 |
6.69ms from Frankfurt am Main,
DE
|
|
| 185.46.122.161 |
0.42ms from Frankfurt am Main,
DE
|
|
| 217.85.17.225 |
3.22ms from Hamburg,
DE
|
|
| 124.89.170.1 |
7.25ms from Hangzhou,
CN
|
|
| 207.226.219.97 |
1.16ms from Hong Kong,
HK
|
Traceroute
Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.
IPinfo ProbeNet
in San Diego, 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.
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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