AS23641 NS Computer Service Corporation

Japan NSCS-NET APNIC 2 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

6,144

IPv6 /48 networks

65,536

RPKI

0 valid3 no ROA

Peers and downstreams

Holder

AS name: NSCS-NET
Description: NS Computer Service Corporation 3-3-2 Kanefusa,Nagaoka-shi,Niigata,940-0045,Japan
Organisation: NS Computer Service Corporation
Abuse contact: Not published
Assigned: 2003-01-30
Record last changed: 2007-10-15 22:22 UTC

203.86.224.0/21 211.19.16.0/20

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade D · 55/100

fail	Prefixes covered by valid ROAs 0 of 3 announced prefixes are RPKI valid, 3 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
partly	More than one upstream 1 upstream seen in BGP.	5/10
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 2007-10-15.	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/23641"><img src="https://ip-fd.net/badge/asn/23641/health.svg" alt="AS23641 network health on IP-FD.net"></a>

Markdown

[![AS23641 network health](https://ip-fd.net/badge/asn/23641/health.svg)](https://ip-fd.net/asn/23641)

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

Routing changes

Last 30 days

2026-10-04 12:51 UTC	Relationship changed	AS9498	upstream to peer
2026-10-04 12:51 UTC	Relationship changed	AS9304	upstream to peer
2026-10-04 12:51 UTC	Relationship changed	AS9002	upstream to peer
2026-10-04 12:51 UTC	Relationship changed	AS24482	upstream to peer

WHOIS

aut-num:        AS23641
as-name:        NSCS-NET
handle:         AS23641
remarks:        NS Computer Service Corporation
technical:      JP00025743
technical,administrative:JNIC1-AP (Japan Network Information Center) <hostmaster@nic.ad.jp>
abuse:          IRT-JPNIC-JP (IRT-JPNIC-JP) <hostmaster@nic.ad.jp>
administrative: HA2729JP
last changed:   2007-10-15T22:22:24Z
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/23641

const res = await fetch('https://ip-fd.net/api/v1/asn/23641', {
  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/23641', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/23641');
curl_setopt($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/23641", 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))

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