AS23581 Hynix Semiconductor Inc.

South Korea HYNIX-AS-KR APNIC 16 IPv4 prefixes 0 IPv6 prefixes

IPv4 addresses

4,096

IPv6 /48 networks

RPKI

0 valid16 no ROA

Peers and downstreams

Holder

AS name: HYNIX-AS-KR
Description: Hynix Semiconductor Inc.
Organisation: Hynix Semiconductor Inc.
Abuse contact: Not published
Assigned: 2002-12-23

166.125.0.0/24 166.125.230.0/24 166.125.239.0/24 166.125.240.0/24 166.125.241.0/24 166.125.242.0/24 166.125.243.0/24 166.125.244.0/24 166.125.245.0/24 166.125.246.0/24 166.125.248.0/24 166.125.250.0/24 166.125.251.0/24 166.125.252.0/24 166.125.253.0/24 166.125.254.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade D · 47/100

fail	Prefixes covered by valid ROAs 0 of 16 announced prefixes are RPKI valid, 16 have no ROA.	0/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
fail	Announces IPv6 No IPv6 prefixes are announced.	0/15
pass	More than one upstream 2 upstreams seen in BGP.	10/10
pass	Working abuse contact hostmaster@nic.or.kr 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
n/a	Registry record maintained We have no change date for this record.

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/23581"><img src="https://ip-fd.net/badge/asn/23581/health.svg" alt="AS23581 network health on IP-FD.net"></a>

Markdown

[![AS23581 network health](https://ip-fd.net/badge/asn/23581/health.svg)](https://ip-fd.net/asn/23581)

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

Routing changes

Last 30 days

2026-10-03 22:59 UTC

New prefix

166.125.230.0/24

WHOIS

aut-num:        AS23581
as-name:        HYNIX-AS-KR-KR
handle:         AS23581
remarks:        Hynix Semiconductor Inc.
administrative,technical:SC536-KR (AS Manager) <eunha2.lee@sk.com>
abuse:          IRT-KRNIC-KR (IRT-KRNIC-KR) <hostmaster@nic.or.kr>
source:         APNIC (RDAP)

Routing data

Updated 2 days ago

Registry record

Fetched 2 days ago 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/23581

const res = await fetch('https://ip-fd.net/api/v1/asn/23581', {
  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/23581', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/23581');
curl_setopt($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/23581", 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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