AS39790 Web4U s.r.o.

Czechia WEB4U RIPE 5 IPv4 prefixes 3 IPv6 prefixes

IPv4 addresses

5,120

IPv6 /48 networks

65,536

RPKI

8 valid0 no ROA

Peers and downstreams

Holder

AS name: WEB4U
Description: Web4U s.r.o.
Organisation: Web4U s.r.o.
Abuse contact: abuse@web4u.cz
Assigned: 2006-04-24
Registered: 2006-04-25
Record last changed: 2026-07-22 12:11 UTC

185.14.224.0/22 185.14.224.0/23 81.91.80.0/20 81.91.80.0/21 81.91.88.0/21

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade A · 90/100

pass	Prefixes covered by valid ROAs 8 of 8 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 3 IPv6 prefixes.	15/15
pass	More than one upstream 3 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@web4u.cz 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 2026-07-22.	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/39790"><img src="https://ip-fd.net/badge/asn/39790/health.svg" alt="AS39790 network health on IP-FD.net"></a>

Markdown

[![AS39790 network health](https://ip-fd.net/badge/asn/39790/health.svg)](https://ip-fd.net/asn/39790)

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

Routing changes

Last 30 days

2026-10-04 18:09 UTC	Relationship changed	AS8218	upstream to peer
2026-10-04 18:09 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 18:09 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 18:09 UTC	Relationship changed	AS47200	upstream to peer
2026-10-04 18:09 UTC	Relationship changed	AS4455	upstream to peer
2026-10-04 18:09 UTC	Relationship changed	AS264409	upstream to peer
2026-10-04 18:09 UTC	Relationship changed	AS263444	upstream to peer
2026-10-04 18:09 UTC	Relationship changed	AS22356	upstream to peer
2026-10-04 18:09 UTC	Relationship changed	AS1764	upstream to peer
2026-10-04 18:09 UTC	Relationship changed	AS14840	upstream to peer

WHOIS

aut-num:        AS39790
as-name:        WEB4U
org:            ORG-WS296-RIPE
remarks:        
remarks:        ===================================================================
remarks:        ===[ UPSTREAM CONNECTIVITY ]=======================================
remarks:        ===================================================================
remarks:        
remarks:        ---[ Comsource ]---
remarks:        ---[ CRA ]---
remarks:        
remarks:        ===================================================================
remarks:        ===[ NIX.CZ IPV4 PEERINGS ]========================================
remarks:        ===================================================================
remarks:        
remarks:        
remarks:        ===================================================================
remarks:        
admin-c:        WM3536-RIPE
tech-c:         WM3536-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-WEB4U
created:        2006-04-25T12:37:01Z
last-modified:  2026-07-22T12:11:38Z
source:         RIPE
% 90 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/39790

const res = await fetch('https://ip-fd.net/api/v1/asn/39790', {
  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/39790', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/39790');
curl_setopt($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/39790", 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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