AS17939 miyazaki cabletelevision network Co.,LTD

Japan MCN-NET01 APNIC 10 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

71,680

IPv6 /48 networks

65,536

RPKI

0 valid11 no ROA

Peers and downstreams

Holder

AS name: MCN-NET01
Description: miyazaki cabletelevision network Co.,LTD 2-119, Gion, Miyazaki-shi, Miyazaki, 880-0024 JAPAN
Organisation: miyazaki cabletelevision network Co.,LTD
Abuse contact: Not published
Assigned: 2001-09-20
Record last changed: 2002-10-28 19:06 UTC

103.15.188.0/22 123.176.128.0/17 150.91.208.0/20 192.244.32.0/19 202.122.176.0/20 202.170.96.0/20 203.140.208.0/20 218.216.32.0/19 219.100.216.0/22 219.105.64.0/20

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade C · 60/100

fail	Prefixes covered by valid ROAs 0 of 11 announced prefixes are RPKI valid, 11 have no ROA.	0/25
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 4 upstreams seen in BGP.	10/10
pass	Working abuse contact hostmaster@nic.ad.jp 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
fail	Registry record maintained Last changed 2002-10-28.	0/5

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/17939"><img src="https://ip-fd.net/badge/asn/17939/health.svg" alt="AS17939 network health on IP-FD.net"></a>

Markdown

[![AS17939 network health](https://ip-fd.net/badge/asn/17939/health.svg)](https://ip-fd.net/asn/17939)

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

Routing changes

Last 30 days

2026-10-04 11:49 UTC	Relationship changed	AS9002	upstream to peer
2026-10-04 11:49 UTC	Relationship changed	AS9583	upstream to peer
2026-10-04 11:49 UTC	Relationship changed	AS8966	upstream to peer
2026-10-04 11:49 UTC	Relationship changed	AS20485	upstream to peer
2026-10-04 11:49 UTC	New neighbour	AS20326	peer
2026-10-04 11:49 UTC	Relationship changed	AS137409	upstream to peer

WHOIS

aut-num:        AS17939
as-name:        MCN-NET01
handle:         AS17939
remarks:        miyazaki cabletelevision network Co.,LTD
technical,administrative:JNIC1-AP (Japan Network Information Center) <hostmaster@nic.ad.jp>
technical,administrative:MI2163JP
abuse:          IRT-JPNIC-JP (IRT-JPNIC-JP) <hostmaster@nic.ad.jp>
technical:      YN4520JP
last changed:   2002-10-28T19:06:40Z
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/17939

const res = await fetch('https://ip-fd.net/api/v1/asn/17939', {
  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/17939', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/17939');
curl_setopt($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/17939", 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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