AS1237 KISTI

South Korea KREONET-AS-KR APNIC 212 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

299,776

IPv6 /48 networks

65,536

RPKI

205 valid8 no ROA

Peers and downstreams

Holder

AS name: KREONET-AS-KR
Description: KISTI
Organisation: KISTI
Abuse contact: Not published
Assigned: 2002-07-31

134.75.0.0/16 134.75.20.0/24 134.75.250.0/24 134.75.52.0/23 147.47.120.0/21 147.47.124.0/24 147.47.125.0/24 150.183.0.0/16 150.183.11.0/24 202.30.40.0/22 202.30.60.0/22 202.31.182.0/24 203.230.0.0/24 203.230.108.0/22 203.230.116.0/23 203.230.116.0/24 203.230.120.0/24 203.230.126.0/24 203.230.16.0/23 203.230.2.0/24 203.230.22.0/23 203.230.24.0/21 203.230.3.0/24 203.230.6.0/24 203.230.60.0/22 203.230.64.0/21 203.230.7.0/24 203.230.72.0/24 203.230.73.0/24 203.230.74.0/23 203.230.76.0/22 203.230.8.0/22 203.233.155.0/24 203.233.156.0/24 203.241.116.0/23 203.241.118.0/24 203.241.120.0/22 203.241.164.0/24 203.241.165.0/24 203.241.169.0/24 203.241.170.0/23 203.241.172.0/23 203.241.174.0/24 203.241.40.0/21 203.247.160.0/22 203.247.164.0/23 203.247.167.0/24 203.247.170.0/23 203.247.172.0/22 203.247.176.0/22 203.247.180.0/23 203.247.184.0/24 203.247.185.0/24 203.247.187.0/24 203.247.188.0/24 203.247.190.0/23 203.247.192.0/20 203.247.216.0/22 203.247.64.0/24 203.247.69.0/24 203.247.73.0/24 203.250.0.0/19 203.250.110.0/24 203.250.112.0/21 203.250.155.0/24 203.250.156.0/22 203.250.156.0/24 203.250.160.0/21 203.250.172.0/22 203.250.176.0/21 203.250.182.0/24 203.250.183.0/24 203.250.192.0/18 203.250.96.0/21 203.253.135.0/24 203.253.136.0/22 203.253.140.0/22 203.253.224.0/23 203.253.226.0/24 203.253.230.0/23 203.253.234.0/23 203.253.236.0/24 203.253.238.0/24 203.253.96.0/20 203.254.168.0/23 203.254.175.0/24 203.254.176.0/20 203.254.179.0/24 203.254.180.0/24 203.254.181.0/24 203.254.185.0/24 203.254.186.0/24 203.254.40.0/24 210.107.144.0/24 210.107.146.0/24 210.107.152.0/21 210.107.160.0/20 210.107.248.0/22 210.107.252.0/23 210.107.254.0/24 210.110.128.0/21 210.110.143.0/24 210.110.144.0/20 210.110.182.0/24 210.110.183.0/24 210.110.184.0/24 210.110.189.0/24 210.110.190.0/24 210.110.191.0/24 210.110.192.0/22 210.110.196.0/23 210.110.198.0/24 210.110.205.0/24 210.110.206.0/23 210.110.224.0/21 210.110.232.0/24 210.110.235.0/24 210.110.236.0/22 210.110.252.0/24 210.110.254.0/23 210.114.104.0/23 210.114.106.0/24 210.114.108.0/24 210.117.192.0/24 210.117.193.0/24 210.117.194.0/24 210.117.197.0/24 210.117.198.0/24 210.117.208.0/24 210.117.209.0/24 210.117.210.0/23 210.117.211.0/24 210.117.212.0/24 210.117.214.0/23 210.117.216.0/24 210.117.217.0/24 210.117.218.0/24 210.117.219.0/24 210.117.224.0/24 210.117.225.0/24 210.117.226.0/23 210.117.228.0/23 210.117.230.0/24 210.117.236.0/24 210.117.238.0/23 210.117.240.0/21 210.117.248.0/22 210.117.252.0/23 210.119.100.0/23 210.119.113.0/24 210.119.114.0/23 210.119.116.0/24 210.119.122.0/23 210.119.124.0/23 210.119.126.0/24 210.119.20.0/23 210.119.36.0/23 210.119.37.0/24 210.119.40.0/21 210.119.48.0/20 210.119.64.0/19 210.119.71.0/24 210.119.72.0/24 210.119.96.0/22 210.125.0.0/24 210.125.107.0/24 210.125.32.0/20 210.125.56.0/21 210.125.64.0/21 210.125.69.0/24 210.125.84.0/23 210.218.192.0/24 210.218.201.0/24 210.218.202.0/23 210.218.203.0/24 210.218.204.0/23 210.218.206.0/23 210.218.208.0/21 210.218.216.0/22 210.219.32.0/24 210.219.34.0/23 210.219.36.0/22 210.219.40.0/23 210.219.42.0/24 210.219.45.0/24 210.219.47.0/24 210.219.48.0/22 210.219.52.0/24 210.219.55.0/24 210.219.56.0/21 210.219.62.0/23 210.219.62.0/24 210.98.12.0/24 210.98.14.0/23 210.98.24.0/23 210.98.26.0/24 210.98.28.0/22 210.98.44.0/24 210.98.47.0/24 210.98.48.0/21 210.98.48.0/24 210.98.5.0/24 210.98.52.0/24 210.98.54.0/24 210.98.56.0/24 210.98.59.0/24 210.98.6.0/23 210.98.60.0/22 210.98.8.0/22 211.213.190.0/24 218.233.7.0/24 218.234.156.0/24

AS1704	Korea Advanced Institute of Science and Technology KAIST-SEOUL-AS-KR-KR
AS1781	Korea Advanced Institute of Science and Technology KAIST-DAEJEON-AS-KR-KR
AS2385	KRIBB(Korea Research Institute of Bioscience Biotechnology) KRIBB-AS-KR-KR
AS3784	Pohang University of Science and Technology POSTECH-AS-KR-KR
AS7560	Jeonbuk National University CHONBUK-AS-KR
AS9270	Apan-Kr-As-Kr APAN-KR-AS-KR
AS9275	Kasi-As-Kr-Kr KASI-AS-KR-KR
AS9317	INHA UNIVERSITY ITISNET-AS-KR
AS9488	Seoul National University SNU-AS-KR-KR
AS9489	Korea Aerospace Research Institute KARINET-AS-KR
AS9568	KOREA INSTITUTE OF MACHINERY MATERIALS (KIMM) KIMM-AS-KR-KR
AS9637	Korea Basic Science Institute KBSI-AS-KR-KR
AS9686	SungKyunKwan University (SKKU) SKKUNET-AS-KR
AS9695	KISTI KOEXP-AS-KR-KR
AS9949	Hoseo University HOSEO-AS-KR
AS10052	Kyungpook National University KNU-AS-KR
AS10063	Kma-As-Kr KMA-AS-KR
AS10070	KRISS SubDAEJONnetworks connected to backbone KRISS-AS-KR
AS10162	SNUH SNUH-AS-KR-KR
AS10187	Korea Information Society Developement Institute KISDI-AS-KR-KR
AS17579	KISTI KREONET2-AS-KR-KR
AS17595	Korea Institute of Nuclear Safety KINSNET-AS-KR-KR
AS17856	Konyang University KONYANG-AS-KR-KR
AS17866	Korea Institute of Science and Technology KISTNET-AS-KR-KR
AS18026	JEJU NATIONAL UNIVERSITY CHEJU-AS-KR-KR
AS18034	Gangneung-Wonju National University KANGNUNG-AS-KR-KR
AS18297	K-JIST KJISTNET-AS-KR-KR
AS18298	Chungnam National University CNUNET-AS-KR-KR
AS18336	Korea Institute of Oriental Medicine KIOM-AS-KR-KR
AS23596	Korea Internet Security Agency EDNSKR-KR-KR
AS24026	KOREA INSTITUTE OF FUSION ENERGY KFE-AS-KR-KR
AS38426	KOREA RURAL ECONOMIC INSTITUTE KREI-AS-KR-KR
AS38696	Korea Brain Research Institute KBRI-AS-KR-KR
AS45379	Ulsan National Institute of Science and Technology UNIST-AS-KR-KR
AS45963	KIRAMS (Korea Institute of Radiological Medical Sciences) KIRAMS-AS-KR-KR
AS55589	Korea Institute of Industrial Technology KITECH-AS-KR-KR
AS55616	DGIST DGIST-AS-KR-KR
AS131795	KOREA INSTITUTE OF ENERGY RESEARCH KIER-AS-KR-KR
AS131830	Institute for Basic Science IBS-AS-KR-KR
AS131869	UST USTKREONET-AS-KR-KR
AS152212	Korea Institute of Science and Technology Evaluation and Planning IRIS-AS-KR-KR
AS152671	SPARCS SPARCS-AS-KR

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 88/100

partly	Prefixes covered by valid ROAs 205 of 213 announced prefixes are RPKI valid, 8 have no ROA.	24/25
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 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/1237"><img src="https://ip-fd.net/badge/asn/1237/health.svg" alt="AS1237 network health on IP-FD.net"></a>

Markdown

[![AS1237 network health](https://ip-fd.net/badge/asn/1237/health.svg)](https://ip-fd.net/asn/1237)

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

Routing changes

Last 30 days

2026-10-04 15:41 UTC	Relationship changed	AS9318	upstream to peer
2026-10-04 15:41 UTC	Relationship changed	AS399861	upstream to peer

WHOIS

aut-num:        AS1237
as-name:        KREONET-AS-KR-KR
handle:         AS1237
remarks:        KISTI
administrative: IH1-KR (AS Manager) <noc@kreonet.net>
abuse:          IRT-KRNIC-KR (IRT-KRNIC-KR) <hostmaster@nic.or.kr>
technical:      SK1-KR (AS Manager) <noc@kreonet.net>
source:         APNIC (RDAP)

Routing data

Updated 1 min ago

Registry record

Fetched 1 min 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/1237

const res = await fetch('https://ip-fd.net/api/v1/asn/1237', {
  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/1237', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/1237');
curl_setopt($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/1237", 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.

AS4766	Korea Telecom KIXS-AS-KR-KR
AS17579	KISTI KREONET2-AS-KR-KR

AS9318	SK Broadband Co Ltd SKB-AS-KR
AS399861	Mobite Network LLC MOBITE-NET