77.87.0.0/21

PL-CZAJEN IPv4 Poland ASSIGNED PI AS42763

Registration

RIPE

Range: 77.87.0.0 to 77.87.7.255
CIDR: 77.87.0.0/21
Addresses: 2,048
Net name: PL-CZAJEN
Holder: FPUH Czajen Krzysztof Czaja ORG-CZA1-RIPE
Status: ASSIGNED PI
Abuse contact: abuse@czajen.pl
Last updated: 2026-04-26

Routing

Announced prefix	Origin	RPKI
77.87.0.0/21	AS42763 CZAJEN	RPKI valid

More specific assignments

No smaller assignments inside this range.

WHOIS

inetnum:        77.87.0.0 - 77.87.7.255
netname:        PL-CZAJEN
country:        PL
org:            ORG-CZA1-RIPE
status:         ASSIGNED PI
source:         RIPE

organisation:   ORG-CZA1-RIPE
org-name:       FPUH Czajen Krzysztof Czaja
country:        PL

role:           Abuse contact role object
abuse-mailbox:  abuse@czajen.pl
nic-hdl:        ACRO228-RIPE

Location of the first address

Mielec, Poland

Registered organisation address

Report wrong location

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/network/77.87.0.0/21

const res = await fetch('https://ip-fd.net/api/v1/network/77.87.0.0/21', {
  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/77.87.0.0/21', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/network/77.87.0.0/21');
curl_setopt($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/77.87.0.0/21", 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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