AS61251 Host4Biz sp. z o.o.

Poland HOST4BIZ-AS RIPE 4 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

2,816

IPv6 /48 networks

524,288

RPKI

0 valid5 no ROA

Peers and downstreams

Holder

AS name: HOST4BIZ-AS
Description: Host4Biz sp. z o.o.
Organisation: Host4Biz sp. z o.o.
Registered in: Warsaw, Poland
Abuse contact: abuse@host4.biz
Assigned: 2016-05-12
Registered: 2016-05-13
Record last changed: 2026-03-06 19:53 UTC

185.151.244.0/22 77.73.36.0/22 91.195.12.0/23 91.232.127.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade C · 65/100

fail	Prefixes covered by valid ROAs 0 of 5 announced prefixes are RPKI valid, 5 have no ROA.	0/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 1 IPv6 prefix.	15/15
pass	More than one upstream 2 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@host4.biz is published.	15/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
pass	Registry record maintained Last changed 2026-03-06.	5/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/61251"><img src="https://ip-fd.net/badge/asn/61251/health.svg" alt="AS61251 network health on IP-FD.net"></a>

Markdown

[![AS61251 network health](https://ip-fd.net/badge/asn/61251/health.svg)](https://ip-fd.net/asn/61251)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

No changes recorded in the last 30 days. Changes are recorded each time the routing data of this AS is refreshed. Get alerts in real time.

WHOIS

aut-num:        AS61251
as-name:        HOST4BIZ-AS
org:            ORG-HSZO27-RIPE
remarks:        ----------- Upstreams -----------
remarks:        ---------- Downstreams ----------
remarks:        ----------- Contacts ------------
remarks:        Abuse reports: abuse@host4.biz
remarks:        Website: http://host4.biz
remarks:        ---------------------------------
admin-c:        MET21-RIPE
tech-c:         MET21-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         HOST4BIZ-MNT
created:        2016-05-13T11:55:19Z
last-modified:  2026-03-06T19:53:00Z
source:         RIPE
% 10 routing policy lines (import/export) not shown

Routing data

Updated just now

Registry record

Fetched just now from RIPE

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/61251

const res = await fetch('https://ip-fd.net/api/v1/asn/61251', {
  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/asn/61251', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/61251');
curl_setopt($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/asn/61251", 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))

Works without a key at a lower rate. Get a free key.

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