AS201666 Yoonsu Son trading as YSSOFT

South Korea YSSOFT RIPE 1 IPv4 prefix 0 IPv6 prefixes

IPv4 addresses

256

IPv6 /48 networks

RPKI

1 valid0 no ROA

Peers and downstreams

Holder

AS name: YSSOFT
Description: Yoonsu Son trading as YSSOFT
Organisation: Yoonsu Son trading as YSSOFT
Registered in: Hwaseong-si, South Korea
Abuse contact: abuse@ys-soft.kr
Assigned: 2026-02-03
Registered: 2026-02-04
Record last changed: 2026-02-04 15:02 UTC

142.248.230.0/24

Routing changes

Last 30 days

2026-10-04 01:17 UTC	Neighbour gone	AS209735	upstream
2026-10-04 01:17 UTC	Prefix gone	2a06:9801:16::/48
2026-10-04 01:17 UTC	Prefix gone	2607:eb40:6000::/36

WHOIS

aut-num:        AS201666
as-name:        YSSOFT
org:            ORG-YSTA2-RIPE
sponsoring-org: ORG-LCTL2-RIPE
admin-c:        YS2368-RIPE
tech-c:         YS2368-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         YOONSU-SON-MNT
created:        2026-02-04T15:02:47Z
last-modified:  2026-02-04T15:02:47Z
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/201666

const res = await fetch('https://ip-fd.net/api/v1/asn/201666', {
  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/201666', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/201666');
curl_setopt($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/201666", 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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