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	AS138950	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS131325	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS134770	CHINANET jiangsu province network	524,288
221.160.0.0/13	AS4766	Korea Telecom	524,288
221.176.0.0/13	AS24445	China Mobile Communications Corporation	524,288
221.176.0.0/13	AS56044	China Mobile Communications Corporation	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
221.160.0.0/13	AS131101	Korea Telecom	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
221.160.0.0/13	AS18323	Korea Telecom	524,288
221.224.0.0/13	AS23650	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS134756	CHINANET jiangsu province network	524,288
221.160.0.0/13	AS38422	Korea Telecom	524,288
221.176.0.0/13	AS56040	China Mobile Communications Corporation	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
221.216.0.0/13	AS4808	China Unicom Beijing province network	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
221.144.197.104	AS4766 Korea Telecom	`4.32ms` from Seoul, KR
221.144.105.179	AS4766 Korea Telecom	`4.92ms` from Seoul, KR
221.144.231.1	AS4766 Korea Telecom	`2.24ms` from Seoul, KR
221.144.202.11	AS4766 Korea Telecom	`4.60ms` from Seoul, KR
221.144.186.175	AS4766 Korea Telecom	`2.68ms` from Seoul, KR
221.144.147.35	AS4766 Korea Telecom	`2.90ms` from Seoul, KR
221.144.104.44	AS4766 Korea Telecom	`6.25ms` from Seoul, KR
221.144.54.174	AS4766 Korea Telecom	`5.51ms` from Seoul, KR
221.144.209.91	AS4766 Korea Telecom	`2.79ms` from Seoul, KR
221.144.181.252	AS4766 Korea Telecom	`4.04ms` from Seoul, KR
221.144.245.29	AS4766 Korea Telecom	`4.87ms` from Seoul, KR
221.144.81.54	AS4766 Korea Telecom	`6.83ms` from Seoul, KR
221.144.98.169	AS4766 Korea Telecom	`5.26ms` from Seoul, KR
221.144.155.97	AS4766 Korea Telecom	`3.35ms` from Seoul, KR
221.144.187.37	AS4766 Korea Telecom	`4.42ms` from Seoul, KR
221.144.110.254	AS4766 Korea Telecom	`5.87ms` from Seoul, KR
221.144.123.126	AS4766 Korea Telecom	`7.31ms` from Seoul, KR
221.144.99.201	AS4766 Korea Telecom	`5.35ms` from Seoul, KR
221.144.242.193	AS4766 Korea Telecom	`3.94ms` from Seoul, KR
221.144.74.65	AS4766 Korea Telecom	`5.51ms` from Seoul, KR
221.144.239.131	AS4766 Korea Telecom	`2.69ms` from Seoul, KR
221.144.145.145	AS4766 Korea Telecom	`4.15ms` from Seoul, KR
221.144.116.199	AS4766 Korea Telecom	`4.64ms` from Seoul, KR
221.144.137.211	AS4766 Korea Telecom	`2.61ms` from Seoul, KR
221.144.157.193	AS4766 Korea Telecom	`2.48ms` 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
84.32.111.220	AS29802 HIVELOCITY, Inc.	`0.21ms` from Amsterdam, NL
186.61.86.44	AS22927 Telefonica de Argentina	`1.89ms` from Buenos Aires, AR
97.183.151.236	AS6167 Verizon Business	`18.68ms` from Chicago, US
108.253.242.44	AS7018 AT&T Enterprises, LLC	`6.58ms` from Dallas, US
79.227.215.156	AS3320 Deutsche Telekom AG	`4.45ms` from Duesseldorf, DE
59.34.31.28	AS4134 CHINANET-BACKBONE	`7.45ms` from Guangzhou, CN
154.218.171.44	AS137951 ASLINE LIMITED	`0.73ms` from Hong Kong, HK
31.153.121.252	AS6866 Cyprus Telecommunications Authority	`12.85ms` from Larnaca, CY
78.148.233.108	AS13285 TalkTalk Communications Limited	`3.07ms` from London, GB
138.229.110.220	AS20001 Charter Communications Inc	`3.51ms` from Los Angeles, US
178.57.163.204	AS12430 VODAFONE ESPANA S.A.U.	`3.48ms` from Madrid, ES
217.58.253.204	AS3269 Telecom Italia S.p.A.	`9.42ms` from Rome, IT
189.234.244.220	AS8151 UNINET	`4.36ms` from Santiago de Queretaro, MX
23.217.18.44	AS7713 PT Telekomunikasi Indonesia	`5.76ms` from Yogyakarta, ID
141.88.223.220	AS48778 IHK Gesellschaft fuer Informationsverarbeitung mbH	`2.28ms` from Duesseldorf, DE
120.55.84.28	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.14ms` from Hangzhou, CN
220.176.39.92	AS4134 CHINANET-BACKBONE	`8.57ms` from Nanchang, CN
190.33.71.28	AS11556 Cable & Wireless Panama	`1.50ms` from Panama, PA
118.35.182.92	AS4766 Korea Telecom	`7.39ms` from Seoul, KR
46.51.225.60	AS16509 Amazon.com, Inc.	`0.20ms` from Tokyo, JP
195.73.237.12	AS1136 KPN B.V.	`2.92ms` from Amsterdam, NL
151.245.218.188	AS57043 HOSTKEY B.V.	`0.28ms` from Amsterdam, NL
5.204.103.140	AS213155 Yettel Hungary Ltd.	`13.29ms` from Budapest, HU
20.203.92.252	AS8075 Microsoft Corporation	`3.01ms` from Dubai, AE
62.143.167.140	AS3209 Vodafone GmbH	`7.87ms` from Frankfurt am Main, DE

Traceroute

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

traceroute -a -n -q1 221.149.33.230

traceroute to 221.149.33.230 (221.149.33.230): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.31 0.068 ms

2 *

3 *

4 *

5 [AS4766] 112.174.120.70 1.52 ms

6 *

7 *

8 [AS4766] 221.149.33.230 1.394 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On November 15th 2025

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