203.251.80.0/23

AS152232 · kt cloud Co., Ltd

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Summary

Country	South Korea
Domain	kt.com
ASN	AS152232
Parent Range	203.251.0.0/17
Registry	APNIC
ID	KORNET

WHOIS Details

inetnum:        203.251.0.0 - 203.251.127.255
netname:        KORNET
descr:          Korea Telecom
country:        KR
admin-c:        IM667-AP
tech-c:         IM667-AP
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2025-11-03T08:14:06Z
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:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IM667-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2017-03-28T06:37:04Z
source:         APNIC

inetnum:        203.251.0.0 - 203.251.127.255
netname:        KORNET-KR
descr:          Korea Telecom
country:        KR
admin-c:        IA9-KR
tech-c:         IM9-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:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        KT Head Office
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IA9-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:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        KT Head Office
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IM9-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

Overlapping Ranges

BGP prefixes that contain 203.251.80.0/23

Range	ASN	Company	Num of IPs
203.251.0.0/17	AS4766	Korea Telecom	32,768
203.251.0.0/17	AS152232	Korea Telecom	32,768

Nearby Ranges

BGP prefixes that overlap with 203.251.0.0/16

Range	ASN	Company	Num of IPs
203.251.0.0/17	AS4766	Korea Telecom	32,768
203.251.0.0/17	AS152232	Korea Telecom	32,768
203.251.192.0/18	AS9848	SEJONG NETWORKS	16,384
203.251.192.0/18	AS4670	SEJONG NETWORKS	16,384
203.251.128.0/18	AS4766	Korea Telecom	16,384
203.251.192.0/18	AS4664	SEJONG NETWORKS	16,384
203.251.205.0/24	AS4670	SEJONG NETWORKS	256
203.251.112.0/24	AS4766	Busanjangsindaehakgyo	256
203.251.135.0/24	AS4766	Korea Telecom	256
203.251.136.0/24	AS4766	Korea Telecom	256
203.251.137.0/24	AS4766	Korea Telecom	256
203.251.7.0/24	AS4766	Hangukcheoldosiseolgongdan	256
203.251.207.0/24	AS7562	Hyundai Department	256
203.251.237.0/24	AS7562	Hyundai Department	256
203.251.246.0/24	AS9848	SEJONG NETWORKS	256
203.251.249.0/24	AS9848	SEJONG NETWORKS	256
203.251.250.0/24	AS9848	SEJONG NETWORKS	256
203.251.210.0/24	AS9980	Hyundai Information Technology Co. Ltd.	256
203.251.251.0/24	AS9980	Hyundai Information Technology Co. Ltd.	256
203.251.77.0/24	AS38124	Korea Telecom	256
203.251.152.0/24	AS45399	Hanjinjeongbotongsin(ju)	256
203.251.154.0/24	AS45399	Hanjinjeongbotongsin(ju)	256
203.251.201.0/24	AS4670	SEJONG NETWORKS	256
203.251.202.0/24	AS4670	SEJONG NETWORKS	256

Hosted domains

There are 363 domain names hosted across 25 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.251.80.85	hheart.org	141
203.251.81.155	jymotonics.co.kr	67
203.251.81.76	csberry.net	35
203.251.81.78	koreafish.kr	33
203.251.81.11	shalomkids.co.kr	18
203.251.81.79	onjongil.kr	13
203.251.80.131	xn--s39a9pj1oc6aq71cwsa.kr	13
203.251.81.77	gcnodaji.com	8
203.251.81.82	gca.or.kr	5
203.251.81.7	algocampus.com	5
203.251.81.216	dosanim.co.kr	4
203.251.80.15	totalleisureone.co.kr	4
203.251.81.75	djspi.kr	3
203.251.80.83	cplan79.co.kr	3
203.251.81.19	trade1004.co.kr	2
203.251.80.116	unclepapa.co.kr	1
203.251.80.117	apctp.site	1
203.251.81.157	iorbit.co.kr	1
203.251.81.17	gbstory.or.kr	1
203.251.81.3	hvi.kr	1

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

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

IP Address	ASN	Details
203.251.81.3	AS152232 kt cloud Co., Ltd	`6.84ms` from Seoul, KR
203.251.80.81	AS152232 kt cloud Co., Ltd	`7.69ms` 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
77.92.156.7	AS42910 PremierDC Veri Merkezi Anonim Sirketi	`3.46ms` from Ankara, TR
161.253.166.7	AS11039 The George Washington University	`0.53ms` from Ashburn, US
71.77.63.151	AS11426 Charter Communications Inc	`16.83ms` from Ashburn, US
54.173.185.135	AS14618 Amazon.com, Inc.	`0.45ms` from Ashburn, US
98.89.58.167	AS14618 Amazon.com, Inc.	`0.53ms` from Ashburn, US
89.153.61.39	AS2860 NOS COMUNICACOES, S.A.	`8.43ms` from Braga, PT
191.82.88.151	AS22927 Telefonica de Argentina	`18.09ms` from Buenos Aires, AR
220.202.113.167	AS4837 CHINA UNICOM China169 Backbone	`3.35ms` from Changsha, CN
3.150.89.55	AS16509 Amazon.com, Inc.	`0.14ms` from Columbus, US
93.223.36.55	AS3320 Deutsche Telekom AG	`3.19ms` from Duesseldorf, DE
187.64.4.167	AS28573 Claro NXT Telecomunicacoes Ltda	`14.60ms` from Fortaleza, BR
120.26.58.183	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.29ms` from Hangzhou, CN
73.77.7.55	AS7922 Comcast Cable Communications, LLC	`3.85ms` from Houston, US
72.9.177.199	AS2914 NTT America, Inc.	`1.33ms` from London, GB
184.170.218.215	AS25820 IT7 Networks Inc	`0.28ms` from Los Angeles, US
150.162.139.71	AS263300 Universidade Federal de Santa Catarina	`7.33ms` from Novo Hamburgo, BR
104.5.221.167	AS7018 AT&T Enterprises, LLC	`3.39ms` from San Antonio, US
117.55.141.39	AS9770 LG HelloVision Corp.	`10.35ms` from Seoul, KR
115.65.20.87	AS9595 NTT-ME Corporation	`2.79ms` from Tokyo, JP
195.241.14.7	AS1136 KPN B.V.	`6.34ms` from Amsterdam, NL
20.119.241.87	AS8075 Microsoft Corporation	`0.35ms` from Boydton, US
37.128.231.151	AS2614 RoEduNet	`0.57ms` from Bucharest, RO
102.184.118.23	AS24835 Vodafone Data	`16.12ms` from Cairo, EG
46.5.254.247	AS3209 Vodafone GmbH	`7.01ms` from Frankfurt am Main, DE
58.61.151.7	AS4134 CHINANET-BACKBONE	`1.31ms` from Guangzhou, CN

Traceroute

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

traceroute -a -n -q1 203.251.81.129

traceroute to 203.251.81.129 (203.251.81.129): 64 hops max, 52 byte packets

1 [AS15169] 172.253.64.138 1.36 ms

2 *

3 *

4 [AS4766] 112.174.56.98 6.305 ms

5 *

6 [AS4766] 121.150.185.118 7.659 ms

7 [AS152232] 203.251.81.129 8.277 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On March 20th 2026

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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