AS23780 CTB Media Inc.

Japan CTB APNIC 5 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

16,384

IPv6 /48 networks

65,536

RPKI

5 valid1 no ROA

Peers and downstreams

Holder

AS name: CTB
Description: CTB Media Inc. 7-1 horita, beppu-shi
Organisation: CTB Media Inc.
Abuse contact: Not published
Assigned: 2003-06-15
Record last changed: 2003-08-13 22:02 UTC

203.201.52.0/22 211.15.112.0/20 211.19.224.0/19 49.128.24.0/21 49.128.96.0/22

Routing changes

Last 30 days

2026-10-04 05:03 UTC	Relationship changed	AS9583	upstream to peer
2026-10-04 05:03 UTC	Relationship changed	AS8966	upstream to peer
2026-10-04 05:03 UTC	Relationship changed	AS24482	upstream to peer
2026-10-04 05:03 UTC	Relationship changed	AS20485	upstream to peer
2026-10-04 05:03 UTC	Relationship changed	AS137409	upstream to peer

WHOIS

aut-num:        AS23780
as-name:        CTB
handle:         AS23780
remarks:        CTB Media Inc.
technical,administrative:JNIC1-AP (Japan Network Information Center) <hostmaster@nic.ad.jp>
abuse:          IRT-JPNIC-JP (IRT-JPNIC-JP) <hostmaster@nic.ad.jp>
technical,administrative:TN1078JP
last changed:   2003-08-13T22:02:03Z
source:         APNIC (RDAP)

Routing data

Updated just now

Registry record

Fetched just now from APNIC RDAP

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/23780

const res = await fetch('https://ip-fd.net/api/v1/asn/23780', {
  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/23780', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/23780');
curl_setopt($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/23780", 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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