All IP Ranges
221.0.0.0/8
AS4766 | 221.144.0.0/12

221.144.0.0/12

AS4766 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS4766
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

Nearby Ranges

BGP prefixes that overlap with 221.0.0.0/8

Range	ASN	Company	Num of IPs
221.240.0.0/12	AS17506	ARTERIA Networks Corporation	1,048,576
221.160.0.0/13	AS9631	Korea Telecom	524,288
221.176.0.0/13	AS9808	China Mobile Communications Corporation	524,288
221.160.0.0/13	AS9780	Korea Telecom	524,288
221.224.0.0/13	AS4134	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS131325	CHINANET jiangsu province network	524,288
221.176.0.0/13	AS56040	China Mobile Communications Corporation	524,288
221.224.0.0/13	AS134770	CHINANET jiangsu province network	524,288
221.176.0.0/13	AS24445	China Mobile Communications Corporation	524,288
221.160.0.0/13	AS4766	Korea Telecom	524,288
221.176.0.0/13	AS56046	China Mobile Communications Corporation	524,288
221.176.0.0/13	AS56042	China Mobile Communications Corporation	524,288
221.176.0.0/13	AS56048	China Mobile Communications Corporation	524,288
221.224.0.0/13	AS4809	CHINANET jiangsu province network	524,288
221.184.0.0/13	AS4713	NTT DOCOMO BUSINESS,Inc.	524,288
221.224.0.0/13	AS137697	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS137702	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS138950	CHINANET jiangsu province network	524,288
221.176.0.0/13	AS139080	China Mobile Communications Corporation	524,288
221.224.0.0/13	AS140292	CHINANET jiangsu province network	524,288
221.216.0.0/13	AS4808	China Unicom Beijing province network	524,288
221.160.0.0/13	AS131101	Korea Telecom	524,288
221.224.0.0/13	AS23650	CHINANET jiangsu province network	524,288
221.176.0.0/13	AS56044	China Mobile Communications Corporation	524,288
221.160.0.0/13	AS38422	Korea Telecom	524,288
221.224.0.0/13	AS146966	CHINANET jiangsu province network	524,288
221.176.0.0/13	AS141425	China Mobile Communications Corporation	524,288
221.224.0.0/13	AS134756	CHINANET jiangsu province network	524,288
221.160.0.0/13	AS18323	Korea Telecom	524,288
221.176.0.0/13	AS132510	China Mobile Communications Corporation	524,288
221.200.0.0/14	AS4837	China Unicom Liaoning Province Network	262,144
221.124.0.0/14	AS9304	HGC Global Communications Limited	262,144
221.232.0.0/14	AS4134	CHINANET Hubei province network	262,144
221.140.0.0/14	AS38695	SK Broadband Co Ltd	262,144
221.140.0.0/14	AS131812	SK Broadband Co Ltd	262,144
221.140.0.0/14	AS16669	SK Broadband Co Ltd	262,144

Hosted domains

There are 1,808 domain names hosted across 838 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
221.149.135.231	karis21.or.kr	31
221.159.48.60	maxcard.kr	28
221.147.192.243	dvp.or.kr	25
221.144.12.64	spaya.co.kr	15
221.156.137.138	winiaaid.or.kr	14
221.150.76.99	suntronix.co.kr	13
221.147.192.205	bigbowl.or.kr	11
221.156.137.103	marinaportal.or.kr	11
221.155.253.133	dandi.ne.kr	9
221.157.125.140	designnetwork.co.kr	9
221.148.3.234	xn--o80bp9mc8ck3f75y.net	9
221.157.125.135	corejewelry.co.kr	7
221.145.132.102	xn--h50bl8j80dpsg9vgwa541ezjz.com	7
221.144.61.90	ksdb.store	7
221.149.101.250	hotelriviera.co.kr	6
221.158.107.100	kgcpr.or.kr	6
221.146.6.184	nemonuri.kr	6
221.146.70.208	fonts.kr	5
221.152.133.203	xson.kr	5
221.150.36.87	xn--3i0bl5io3mn2dba.com	5

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

533,134 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
221.157.42.130	AS4766 Korea Telecom	`4.76ms` from Seoul, KR
221.156.224.78	AS4766 Korea Telecom	`5.58ms` from Seoul, KR
221.157.121.254	AS4766 Korea Telecom	`4.49ms` from Seoul, KR
221.156.223.16	AS4766 Korea Telecom	`5.36ms` from Seoul, KR
221.157.83.24	AS4766 Korea Telecom	`6.26ms` from Seoul, KR
221.156.177.94	AS4766 Korea Telecom	`6.93ms` from Seoul, KR
221.157.74.104	AS4766 Korea Telecom	`6.72ms` from Seoul, KR
221.157.88.60	AS4766 Korea Telecom	`6.91ms` from Seoul, KR
221.157.148.18	AS4766 Korea Telecom	`5.28ms` from Seoul, KR
221.157.92.254	AS4766 Korea Telecom	`6.44ms` from Seoul, KR
221.156.217.254	AS4766 Korea Telecom	`6.58ms` from Seoul, KR
221.157.1.187	AS4766 Korea Telecom	`4.77ms` from Seoul, KR
221.157.27.85	AS4766 Korea Telecom	`5.03ms` from Seoul, KR
221.157.157.64	AS4766 Korea Telecom	`4.92ms` from Seoul, KR
221.156.174.224	AS4766 Korea Telecom	`7.12ms` from Seoul, KR
221.157.19.73	AS4766 Korea Telecom	`4.64ms` from Seoul, KR
221.157.11.101	AS4766 Korea Telecom	`4.74ms` from Seoul, KR
221.157.143.247	AS4766 Korea Telecom	`4.41ms` from Seoul, KR
221.157.154.30	AS4766 Korea Telecom	`4.80ms` from Seoul, KR
221.157.51.254	AS4766 Korea Telecom	`5.08ms` from Seoul, KR
221.157.14.99	AS4766 Korea Telecom	`4.52ms` from Seoul, KR
221.156.206.46	AS4766 Korea Telecom	`6.88ms` from Seoul, KR
221.157.76.74	AS4766 Korea Telecom	`6.17ms` from Seoul, KR
221.157.120.248	AS4766 Korea Telecom	`4.42ms` from Seoul, KR
221.156.193.117	AS4766 Korea Telecom	`6.21ms` 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
77.170.20.60	AS1136 KPN B.V.	`2.80ms` from Amsterdam, NL
185.148.29.220	AS42707 e-Quest IT Projecten B.V.	`1.77ms` from Amsterdam, NL
91.233.21.12	AS198281 Websas.hu Kft.	`0.91ms` from Budapest, HU
3.14.128.12	AS16509 Amazon.com, Inc.	`0.17ms` from Columbus, US
24.32.6.60	AS19108 Optimum	`6.82ms` from Dallas, US
183.150.82.12	AS4134 CHINANET-BACKBONE	`9.10ms` from Hangzhou, CN
117.4.138.188	AS7552 Viettel Group	`4.41ms` from Hanoi, VN
172.111.141.188	AS9304 HGC Global Communications Limited	`2.06ms` from Hong Kong, HK
86.160.21.220	AS2856 British Telecommunications PLC	`5.17ms` from London, GB
84.64.162.12	AS5378 Vodafone Limited	`7.16ms` from London, GB
138.229.110.220	AS20001 Charter Communications Inc	`3.51ms` from Los Angeles, US
204.216.211.76	AS31898 Oracle Corporation	`0.15ms` from Milan, IT
88.188.141.60	AS12322 Free SAS	`2.45ms` from Paris, FR
92.133.45.252	AS3215 Orange S.A.	`9.14ms` from Paris, FR
72.208.3.124	AS22773 Cox Communications Inc.	`4.38ms` from Phoenix, US
52.23.75.172	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
134.204.178.76	AS18723 Seagate Technology LLC	`0.85ms` from San Jose, US
24.227.8.28	AS14638 Liberty Communications of Puerto Rico LLC	`3.61ms` from San Juan, PR
120.96.252.44	AS1659 Taiwan Academic Network (TANet) Information Center	`2.50ms` from Taipei, TW
194.94.84.140	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`10.09ms` from Berlin, DE
66.26.84.236	AS11426 Charter Communications Inc	`13.86ms` from Charlotte, US
69.175.20.108	AS32475 Internap Holding LLC	`0.91ms` from Chicago, US
74.220.156.92	AS14127 Iland Internet Solutions Corporation	`1.14ms` from Dallas, US
91.89.205.92	AS3209 Vodafone GmbH	`9.46ms` from Frankfurt am Main, DE
36.134.196.156	AS9808 China Mobile Communications Group Co., Ltd.	`7.36ms` from Fuzhou, CN

Traceroute

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

traceroute -a -n -q1 -f7 221.146.6.51

traceroute to 221.146.6.51 (221.146.6.51): 64 hops max, 52 byte packets

7 [AS4766] 112.174.57.146 1.784 ms

8 *

9 [AS4766] 112.188.46.194 3.187 ms

10 *

11 [AS4766] 221.146.6.51 1.728 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On November 14th 2025

What are IP address ranges?

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