1. All IP Ranges
  2. 203.0.0.0/8
  3. 203.233.0.0/16
  4. AS1237  | 203.233.156.0/24

203.233.156.0/24

AS1237  ·  KISTI

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Summary

Country South Korea
Domain kreonet.net
ASN AS1237
Registry APNIC
ID KREONET

WHOIS Details

inetnum:        203.233.156.0 - 203.233.156.255
netname:        KREONet
descr:          KISTI
country:        KR
admin-c:        IM702-AP
tech-c:         IM702-AP
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2025-11-03T07:48:06Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        9, Jinheung-gil, Naju-si, Jeollanam-do
e-mail:         irt@nic.or.kr
abuse-mailbox:  irt@nic.or.kr
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        irt@nic.or.kr was validated on 2020-04-09
mnt-by:         MNT-KRNIC-AP
last-modified:  2025-09-04T01:00:01Z
source:         APNIC

person:         IP Manager
address:        Daejeon Yuseong-gu Daehak-ro 245
country:        KR
phone:          +82-42-869-0707
e-mail:         noc@kreonet.net
nic-hdl:        IM702-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2022-01-11T12:18:02Z
source:         APNIC

route:          203.233.156.0/24
origin:         AS1237
descr:          Korea Internet & Security Agency (KISA) Seocho-ro 398, Seocho-gu, Seoul, Korea
mnt-by:         MNT-KRNIC-AP
last-modified:  2025-06-09T03:07:05Z
source:         APNIC

inetnum:        203.233.156.0 - 203.233.156.255
netname:        KREONet-KR
descr:          KISTI
country:        KR
admin-c:        IA18-KR
tech-c:         IM18-KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

person:         IP Manager
address:        Daejeon Yuseong-gu Daehak-ro 245
address:        KISTI
country:        KR
phone:          +82-42-869-0707
e-mail:         noc@kreonet.net
nic-hdl:        IA18-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr 20240912
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

person:         IP Manager
address:        Daejeon Yuseong-gu Daehak-ro 245
address:        KISTI
country:        KR
phone:          +82-42-869-0707
e-mail:         noc@kreonet.net
nic-hdl:        IM18-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr 20240912
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

Nearby Ranges

BGP prefixes that overlap with 203.233.0.0/16

Range ASN Company Num of IPs
203.233.0.0/17 AS17841 LG DACOM Corporation 32,768
203.233.0.0/17 AS3786 LG DACOM Corporation 32,768
203.233.0.0/17 AS38707 LG DACOM Corporation 32,768
203.233.0.0/17 AS9693 LG DACOM Corporation 32,768
203.233.0.0/17 AS38428 LG DACOM Corporation 32,768
203.233.0.0/17 AS9684 LG DACOM Corporation 32,768
203.233.192.0/19 AS7557 Korea Trade Network 8,192
203.233.224.0/20 AS7557 Korea Trade Network 4,096
203.233.74.0/24 AS38428 LG Uplus 256
203.233.85.0/24 AS9968 Kyobo Life Insurance Co. 256
203.233.43.0/24 AS18295 LG Uplus 256
203.233.44.0/24 AS18295 LG Uplus 256
203.233.9.0/24 AS18373 KOOKMIN BANK 256
203.233.22.0/24 AS23573 LG Uplus 256
203.233.128.0/24 AS3786 Korea Internet Security Agency 256
203.233.165.0/24 AS3786 Korea Internet Security Agency 256
203.233.72.0/24 AS38428 LG Uplus 256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity
Read more

Pingable IPs

8 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
203.233.156.97 AS1237 KISTI 0.92ms from Seoul, KR

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
52.46.135.248 AS16509 Amazon.com, Inc. 0.38ms from Ashburn, US
76.125.172.248 AS7922 Comcast Cable Communications, LLC 12.75ms from Ashburn, US
94.64.203.120 AS6799 Ote SA (Hellenic Telecommunications Organisation) 1.21ms from Athens, GR
197.94.206.24 AS20011 Dimension Data 1.35ms from Cape Town, ZA
3.72.134.152 AS16509 Amazon.com, Inc. 0.24ms from Frankfurt am Main, DE
82.223.228.88 AS8560 IONOS SE 0.43ms from Logrono, ES
188.15.136.232 AS3269 Telecom Italia S.p.A. 4.43ms from Milan, IT
119.180.37.40 AS4837 CHINA UNICOM China169 Backbone 7.45ms from Qingdao, CN
187.237.169.8 AS8151 UNINET 17.64ms from Santiago de Queretaro, MX
121.134.194.72 AS4766 Korea Telecom 1.41ms from Seoul, KR
61.98.7.200 AS9318 SK Broadband Co Ltd 1.83ms from Seoul, KR
126.29.97.104 AS17676 SoftBank Corp. 7.35ms from Tokyo, JP
153.206.39.248 AS4713 NTT DOCOMO BUSINESS,Inc. 3.06ms from Tokyo, JP
50.85.208.88 AS8075 Microsoft Corporation 0.56ms from Amsterdam, NL
200.101.243.152 AS8167 V tal 7.90ms from Curitiba, BR
179.185.34.168 AS18881 TELEFÔNICA BRASIL S.A 12.66ms from Fortaleza, BR
52.59.11.24 AS16509 Amazon.com, Inc. 0.20ms from Frankfurt am Main, DE
94.166.28.248 AS1267 WIND TRE S.P.A. 16.48ms from Frosinone, IT
121.58.79.248 AS4134 CHINANET-BACKBONE 2.94ms from Haikou, CN
217.249.40.120 AS3320 Deutsche Telekom AG 2.99ms from Hamburg, DE
109.87.64.136 AS13188 CONTENT DELIVERY NETWORK LTD 7.52ms from Kyiv, UA
34.102.57.88 AS396982 Google LLC 0.10ms from Los Angeles, US
59.190.66.216 AS17511 OPTAGE Inc. 1.49ms from Osaka, JP
203.53.103.72 AS1221 Telstra Limited 1.31ms from Sydney, AU
220.135.116.120 AS3462 Data Communication Business Group 0.63ms from Taipei, TW

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$
traceroute -a -n -q1 203.233.156.97
traceroute to 203.233.156.97 (203.233.156.97): 64 hops max, 52 byte packets
1 [AS199524] 92.223.73.3 0.153 ms
2 *
3 *
4 *
6 [] 139.150.100.129 1.334 ms
Measurement taken from IPinfo ProbeNet in Seoul, KR
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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