AS43542 OptoNet Communication, spol. s.r.o.

Czechia OptoNet-AS RIPE 1 IPv4 prefix 1 IPv6 prefix

IPv4 addresses

8,192

IPv6 /48 networks

65,536

RPKI

2 valid0 no ROA

Peers and downstreams

Holder

AS name: OptoNet-AS
Description: OptoNet Communication, spol. s.r.o.
Organisation: OptoNet Communication, spol. s.r.o.
Registered in: Jihlava, Czechia
Abuse contact: abuse@optonet.cz
Assigned: 2007-08-19
Registered: 2007-08-20
Record last changed: 2026-03-16 07:54 UTC

78.156.128.0/19

Routing changes

Last 30 days

2026-10-04 06:56 UTC	Relationship changed	AS8218	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS47200	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS4455	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS44306	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS264409	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS263444	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS22356	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS21215	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS1764	upstream to peer
2026-10-04 06:56 UTC	Relationship changed	AS14840	upstream to peer

WHOIS

aut-num:        AS43542
as-name:        OptoNet-AS
org:            ORG-OCLS3-RIPE
remarks:        ======== TRANSIT UPSTREAM ========
remarks:        -- VODAFONE-CZ --
remarks:        -- T-Mobile CZ --
remarks:        ======== IXs peers ========
remarks:        -- NIX.CZ ROUTESERVERS --
remarks:        ======== TRANSIT CUSTOMERS ========
remarks:        -- Kraj Vysocina --
remarks:        -- LCJ s.r.o. --
remarks:        -- NGA Services, spol. s r.o. --
remarks:        -- CNI Group s.r.o. --
admin-c:        TJ1042-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
tech-c:         TJ1042-RIPE
mnt-by:         MNT-OPTONET
created:        2007-08-20T08:25:37Z
last-modified:  2026-03-16T07:54:18Z
source:         RIPE
% 14 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/43542

const res = await fetch('https://ip-fd.net/api/v1/asn/43542', {
  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/43542', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/43542');
curl_setopt($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/43542", 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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