221.157.125.0/24

AS152232 · kt cloud Co., Ltd

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Summary

Country	South Korea
Domain	kt.com
ASN	AS152232
Parent Range	221.144.0.0/12
Registry	APNIC
ID	KORNET-KR

WHOIS Details

inetnum:        221.144.0.0 - 221.159.255.255
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:  2025-11-03T08:15:09Z
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:        221.144.0.0 - 221.159.255.255
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 221.157.125.0/24

Range	ASN	Company	Num of IPs
221.144.0.0/12	AS152214	Korea Telecom	1,048,576
221.144.0.0/12	AS152232	Korea Telecom	1,048,576
221.144.0.0/12	AS4766	Korea Telecom	1,048,576
221.144.0.0/12	AS9856	Korea Telecom	1,048,576

Nearby Ranges

BGP prefixes that overlap with 221.157.0.0/16

Range	ASN	Company	Num of IPs
221.144.0.0/12	AS4766	Korea Telecom	1,048,576
221.144.0.0/12	AS152232	Korea Telecom	1,048,576
221.144.0.0/12	AS9856	Korea Telecom	1,048,576
221.144.0.0/12	AS152214	Korea Telecom	1,048,576
221.157.126.0/24	AS4766	Gyeongbukgwahakdaehakgyo	256
221.157.127.0/24	AS4766	Gyeongbukgwahakdaehakgyo	256
221.157.116.0/24	AS4766	Gyemyeongmunhwadaehakgyojang	256

Hosted domains

There are 44 domain names hosted across 13 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
221.157.125.147	bonghwarun.kr	11
221.157.125.140	koju.co.kr	9
221.157.125.135	core-jewelry.com	7
221.157.125.130	omniherb.co.kr	5
221.157.125.163	cultureexpo.or.kr	2
221.157.125.41	textom.ai	2
221.157.125.56	aino1.co.kr	2
221.157.125.228	xpe.kr	2
221.157.125.198	hedu.kr	2
221.157.125.162	cexpo.or.kr	1
221.157.125.164	cexpo.or.kr	1
221.157.125.229	ipe.kr	1
221.157.125.158	superyesweb.com	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

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

IP Address	ASN	Details
221.157.125.35	AS152232 kt cloud Co., Ltd	`6.89ms` 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
31.97.137.152	AS47583 Hostinger International Limited	`0.72ms` from Boston, US
79.146.107.200	AS3352 TELEFONICA DE ESPANA S.A.U.	`1.41ms` from Madrid, ES
31.45.90.56	AS2119 Telenor Norge AS	`10.02ms` from Oslo, NO
78.198.66.40	AS12322 Free SAS	`1.94ms` from Paris, FR
95.246.228.168	AS3269 Telecom Italia S.p.A.	`4.61ms` from Rome, IT
207.204.245.136	AS22781 Strong Technology, LLC.	`0.56ms` from San Jose, US
67.116.1.8	AS7018 AT&T Enterprises, LLC	`1.58ms` from San Jose, US
187.75.200.120	AS27699 TELEFÔNICA BRASIL S.A	`2.13ms` from São Paulo, BR
181.121.195.40	AS23201 Telecel S.A.	`10.47ms` from Asuncion, PY
154.176.157.120	AS8452 TE-AS	`3.90ms` from Cairo, EG
113.46.218.40	AS55990 Huawei Cloud Service data center	`1.60ms` from Guangzhou, CN
126.214.203.24	AS17676 SoftBank Corp.	`3.89ms` from Osaka, JP
179.73.156.184	AS26615 TIM S/A	`1.71ms` from Osasco, BR
94.180.238.200	AS41668 JSC ER-Telecom Holding	`8.26ms` from Samara, RU
58.192.56.136	AS4538 China Education and Research Network Center	`12.43ms` from Shanghai, CN
122.94.176.120	AS56046 China Mobile communications corporation	`4.30ms` from Suzhou, CN
99.247.55.56	AS812 Rogers Communications Canada Inc.	`3.39ms` from Toronto, CA
202.44.135.136	AS140618 Silpakorn University	`4.59ms` from Bangkok, TH
44.251.34.168	AS16509 Amazon.com, Inc.	`0.12ms` from Boardman, US
91.46.174.56	AS3320 Deutsche Telekom AG	`3.83ms` from Duesseldorf, DE
197.93.115.72	AS20011 Dimension Data	`1.90ms` from Durban, ZA
125.240.137.200	AS17858 LG POWERCOMM	`2.54ms` from Incheon, KR
45.220.169.8	AS32653 eNetworks cc	`0.27ms` from Johannesburg, ZA
73.242.75.232	AS7922 Comcast Cable Communications, LLC	`5.70ms` from Minneapolis, US
112.227.121.72	AS4837 CHINA UNICOM China169 Backbone	`4.66ms` from Qingdao, CN

Traceroute

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

traceroute -a -n -q1 221.157.125.161

traceroute to 221.157.125.161 (221.157.125.161): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.45 0.082 ms

2 *

3 *

4 *

5 [AS4766] 112.174.58.194 7.222 ms

6 *

7 [AS4766] 121.150.185.118 7.691 ms

8 [AS152232] 221.157.125.161 7.644 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On March 21st 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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