209.131.72.0/21

IPv4 United States ALLOCATED AS4213

ARIN does not publish its WHOIS database in bulk, so this page shows the delegation record and live routing data. Look up an address inside the range for location data.

Registration

ARIN

Range: 209.131.72.0 to 209.131.79.255
CIDR: 209.131.72.0/21
Addresses: 2,048
Description: Part of 209.131.72.0 - 209.131.79.255, delegated by ARIN on 2025-08-25
Holder: Not published
Status: ALLOCATED
Abuse contact: Not published
Last updated

Routing

Announced prefix	Origin	RPKI
209.131.72.0/21	AS4213	RPKI valid

More specific assignments

No smaller assignments inside this range.

WHOIS

inetnum:        209.131.72.0/21
descr:          Part of 209.131.72.0 - 209.131.79.255, delegated by ARIN on 2025-08-25
country:        US
status:         ALLOCATED
source:         ARIN

Location of the first address

United States

Registry country

Report wrong location

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/network/209.131.72.0/21

const res = await fetch('https://ip-fd.net/api/v1/network/209.131.72.0/21', {
  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/209.131.72.0/21', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/network/209.131.72.0/21');
curl_setopt($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/209.131.72.0/21", 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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