AS204409 Prestonet s.r.o.

Czechia cz-Prestonet RIPE 1 IPv4 prefix 1 IPv6 prefix

IPv4 addresses

1,024

IPv6 /48 networks

65,536

RPKI

2 valid0 no ROA

Peers and downstreams

Holder

AS name: cz-Prestonet
Description: Prestonet s.r.o.
Organisation: Prestonet s.r.o.
Abuse contact: noc@prestonet.cz
Assigned: 2018-03-14
Registered: 2018-03-15
Record last changed: 2024-03-13 12:44 UTC

185.249.112.0/22

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade A · 90/100

pass	Prefixes covered by valid ROAs 2 of 2 announced prefixes are RPKI valid.	25/25
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 noc@prestonet.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 2024-03-13.	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/204409"><img src="https://ip-fd.net/badge/asn/204409/health.svg" alt="AS204409 network health on IP-FD.net"></a>

Markdown

[![AS204409 network health](https://ip-fd.net/badge/asn/204409/health.svg)](https://ip-fd.net/asn/204409)

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

Routing changes

Last 30 days

2026-10-04 21:44 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS42000	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS41327	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS264409	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS24482	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS22356	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS20562	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS1764	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS14840	upstream to peer
2026-10-04 21:44 UTC	Relationship changed	AS13194	upstream to peer

WHOIS

aut-num:        AS204409
as-name:        cz-Prestonet
org:            ORG-KSS14-RIPE
admin-c:        JO4612-RIPE
tech-c:         TH8273-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         cz-prestonet-1-mnt
created:        2018-03-15T13:29:27Z
last-modified:  2024-03-13T12:44:33Z
source:         RIPE
% 4 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/204409

const res = await fetch('https://ip-fd.net/api/v1/asn/204409', {
  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/204409', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/204409');
curl_setopt($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/204409", 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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