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	AS131842	Korea Telecom	1,048,576
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	AS131842	Korea Telecom	1,048,576
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
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

28 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	`6.95ms` 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
86.88.149.24	AS1136 KPN B.V.	`1.48ms` from Amsterdam, NL
24.131.29.88	AS7922 Comcast Cable Communications, LLC	`10.20ms` from Ashburn, US
23.127.183.24	AS7018 AT&T Enterprises, LLC	`5.86ms` from Atlanta, US
157.137.213.40	AS31898 Oracle Corporation	`0.18ms` from Bogota, CO
76.203.14.104	AS7018 AT&T Enterprises, LLC	`5.94ms` from Dallas, US
54.38.22.248	AS16276 OVH SAS	`0.10ms` from Gravelines, FR
59.20.115.8	AS4766 Korea Telecom	`6.33ms` from Incheon, KR
154.16.23.184	AS201341 trafficforce, UAB	`0.11ms` from Johannesburg, ZA
95.92.160.120	AS2860 NOS COMUNICACOES, S.A.	`6.17ms` from Lisbon, PT
122.197.97.136	AS9617 JCOM Co., Ltd.	`3.48ms` from Osaka, JP
60.211.97.24	AS4837 CHINA UNICOM China169 Backbone	`9.28ms` from Qingdao, CN
106.14.52.200	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.41ms` from Shanghai, CN
35.75.31.216	AS16509 Amazon.com, Inc.	`0.20ms` from Tokyo, JP
69.158.91.24	AS577 Bell Canada	`6.00ms` from Toronto, CA
177.152.28.40	AS262399 GLP Telecomunicações Ltda.	`4.70ms` from Chapeco, BR
172.213.139.8	AS8075 Microsoft Corporation	`0.17ms` from Milan, IT
20.195.242.120	AS8075 Microsoft Corporation	`0.19ms` from Sao Paulo, BR
118.168.251.120	AS3462 Data Communication Business Group	`1.11ms` from Taipei, TW
120.92.119.216	AS59019 Beijing Kingsoft Cloud Internet Technology Co., Ltd	`2.76ms` from Tianjin, CN
54.39.235.184	AS16276 OVH SAS	`0.12ms` from Beauharnois, CA
86.124.73.184	AS8708 DIGI ROMANIA S.A.	`0.70ms` from Bucharest, RO
98.4.182.8	AS11351 Charter Communications Inc	`16.48ms` from Chicago, US
108.251.222.216	AS7018 AT&T Enterprises, LLC	`11.82ms` from Chicago, US
221.134.153.184	AS9583 Sify Limited	`2.27ms` from Delhi, IN
91.125.184.152	AS6871 Plusnet	`4.90ms` from Erith, GB

Traceroute

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

traceroute -a -n -q1 221.157.125.152

traceroute to 221.157.125.152 (221.157.125.152): 64 hops max, 52 byte packets

1 [AS15169] 172.253.64.138 0.597 ms

2 *

3 *

4 *

5 *

6 [AS4766] 121.150.185.114 6.994 ms

7 *

8 *

9 [AS152232] 221.157.125.152 11.13 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On February 7th 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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