AS4671 KTOA

South Korea KTOA-AS-KR APNIC 9 IPv4 prefixes 3 IPv6 prefixes

IPv4 addresses

528

IPv6 /48 networks

RPKI

0 valid12 no ROA

Peers and downstreams

Holder

AS name: KTOA-AS-KR
Description: KTOA
Organisation: KTOA
Abuse contact: Not published
Assigned: 1995-05-29

103.55.35.0/27 103.55.35.32/27 121.134.220.0/27 121.134.220.32/27 125.131.87.0/25 210.91.80.192/26 211.38.137.64/26 220.75.238.128/25 222.106.198.192/28

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade D · 53/100

fail	Prefixes covered by valid ROAs 0 of 12 announced prefixes are RPKI valid, 12 have no ROA.	0/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 3 IPv6 prefixes.	15/15
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
fail	No prefixes smaller than /24 or /48 9 prefixes are smaller than most networks accept (103.55.35.0/27, 103.55.35.32/27, 121.134.220.0/27).	0/10
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/4671"><img src="https://ip-fd.net/badge/asn/4671/health.svg" alt="AS4671 network health on IP-FD.net"></a>

Markdown

[![AS4671 network health](https://ip-fd.net/badge/asn/4671/health.svg)](https://ip-fd.net/asn/4671)

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

Routing changes

Last 30 days

2026-10-04 04:46 UTC	Relationship changed	AS4766	upstream to peer
2026-10-04 04:46 UTC	New prefix	121.134.220.0/27
2026-10-04 04:46 UTC	New prefix	222.106.198.192/28
2026-10-04 04:46 UTC	New prefix	211.38.137.64/26
2026-10-04 04:46 UTC	New prefix	103.55.35.0/27
2026-10-04 04:46 UTC	New prefix	210.91.80.192/26
2026-10-04 04:46 UTC	New prefix	103.55.35.32/27
2026-10-04 04:46 UTC	New prefix	121.134.220.32/27

WHOIS

aut-num:        AS4671
as-name:        KTOA-AS-KR-KR
handle:         AS4671
remarks:        KTOA
abuse:          IRT-KRNIC-KR (IRT-KRNIC-KR) <hostmaster@nic.or.kr>
administrative,technical:GY5031-KR (AS Manager) <allen@ktoa.or.kr>
source:         APNIC (RDAP)

Routing data

Updated 1 days ago

Registry record

Fetched 1 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/4671

const res = await fetch('https://ip-fd.net/api/v1/asn/4671', {
  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/4671', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/4671');
curl_setopt($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/4671", 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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