210.77.0.0/19

CSTNET-CN IPv4 China ALLOCATED PORTABLE AS7497

Registration

APNIC

Range: 210.77.0.0 to 210.77.31.255
CIDR: 210.77.0.0/19
Addresses: 8,192
Net name: CSTNET-CN
Description: Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)
Holder: CNIC-CAS ORG-CA107-AP
Status: ALLOCATED PORTABLE
Abuse contact: Not published
Last updated: 2026-04-26

Routing

Announced prefix	Origin	RPKI
210.77.0.0/19	AS7497 CSTNET-AS-AP	RPKI valid

More specific assignments

No smaller assignments inside this range.

WHOIS

inetnum:        210.77.0.0 - 210.77.31.255
netname:        CSTNET-CN
descr:          Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)
country:        CN
org:            ORG-CA107-AP
status:         ALLOCATED PORTABLE
source:         APNIC

organisation:   ORG-CA107-AP
org-name:       CNIC-CAS
country:        CN

Location of the first address

China

Registry country

Report wrong location

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/network/210.77.0.0/19

const res = await fetch('https://ip-fd.net/api/v1/network/210.77.0.0/19', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/network/210.77.0.0/19', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/network/210.77.0.0/19');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/network/210.77.0.0/19", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

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