AS25424 CEZNET s.r.o.

Czechia INEXT-CZ RIPE 7 IPv4 prefixes 2 IPv6 prefixes

IPv4 addresses

33,792

IPv6 /48 networks

1,048,576

RPKI

9 valid0 no ROA

Peers and downstreams

Holder

AS name: INEXT-CZ
Description: INTERNEXT 2000
Organisation: CEZNET s.r.o.
Abuse contact: dohled@ceznet.cz
Assigned: 2002-11-18
Registered: 2002-11-19
Record last changed: 2026-08-07 09:47 UTC

185.157.196.0/22 188.244.48.0/20 212.111.0.0/19 37.9.192.0/21 77.92.192.0/19 85.92.32.0/19 91.109.32.0/21

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade A · 100/100

pass	Prefixes covered by valid ROAs 9 of 9 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 2 IPv6 prefixes.	15/15
pass	More than one upstream 4 upstreams seen in BGP.	10/10
pass	Working abuse contact dohled@ceznet.cz is published.	15/15
pass	Publishes a geofeed A geofeed (RFC 8805) tells where the address space is used.	10/10
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 2026-08-07.	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/25424"><img src="https://ip-fd.net/badge/asn/25424/health.svg" alt="AS25424 network health on IP-FD.net"></a>

Markdown

[![AS25424 network health](https://ip-fd.net/badge/asn/25424/health.svg)](https://ip-fd.net/asn/25424)

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

Routing changes

Last 30 days

2026-10-04 10:36 UTC	Relationship changed	AS8218	upstream to peer
2026-10-04 10:36 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 10:36 UTC	Relationship changed	AS6461	upstream to peer
2026-10-04 10:36 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 10:36 UTC	Relationship changed	AS4455	upstream to peer
2026-10-04 10:36 UTC	Relationship changed	AS264409	upstream to peer
2026-10-04 10:36 UTC	Relationship changed	AS1764	upstream to peer
2026-10-04 10:36 UTC	Relationship changed	AS14840	upstream to peer

WHOIS

aut-num:        AS25424
org:            ORG-TBS13-RIPE
as-name:        INEXT-CZ
descr:          INTERNEXT 2000
remarks:        Routing and peering contact: noc@inext.cz
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        
abuse-c:        IA3288-RIPE
admin-c:        RH163-RIPE
tech-c:         RH163-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         CEZNET-MNT
mnt-by:         INEXT-CZ-MNT
created:        2002-11-19T08:42:25Z
last-modified:  2026-08-07T09:47:41Z
source:         RIPE
% 516 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/25424

const res = await fetch('https://ip-fd.net/api/v1/asn/25424', {
  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/25424', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/25424');
curl_setopt($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/25424", 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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