All IP Ranges
221.0.0.0/8
AS4766 | 221.144.0.0/13

221.144.0.0/13

AS4766 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS4766
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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        [email protected] 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:         [email protected]
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:         [email protected]
nic-hdl:        IA9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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:         [email protected]
nic-hdl:        IM9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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 221.144.0.0/13

Range	ASN	Company	Num of IPs
221.144.0.0/12	AS152214	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

BGP prefixes that are contained by 221.144.0.0/13

Range	ASN	Company	Num of IPs
221.150.21.0/24	AS10184	(sa)saemaeulgeumgoyeonhaphoe	256
221.149.141.0/24	AS10185	(ju)hanaeunhaeng	256
221.147.55.0/24	AS4766	Seongmobyeongwon	256
221.144.152.0/24	AS55622	Chuncheongyoyukdaehak	256
221.147.83.0/24	AS9526	(ju)koseu	256
221.151.180.0/24	AS9526	(ju)koseu	256
221.147.101.0/24	AS9850	(ju)waitibi	256
221.150.131.0/24	AS17851	Korea Telecom	256
221.151.165.0/24	AS38405	Korea Telecom	256
221.150.196.0/24	AS38697	Hangyeongdaehakgyo	256
221.149.230.0/24	AS45360	SKbrodeudeu(ju)	256
221.145.178.0/24	AS45400	Korea Telecom	256
221.144.37.0/24	AS4766	Nambudaehakgyo	256
221.145.224.0/24	AS4766	(hak)toldaehakgyodaejeonseongmobyeongwon	256
221.146.17.0/24	AS4766	Sejongsaibeodaehakgyo	256
221.147.51.0/24	AS4766	Seongmobyeongwon	256
221.147.52.0/24	AS4766	Seongmobyeongwon	256
221.147.53.0/24	AS4766	Seongmobyeongwon	256
221.147.54.0/24	AS4766	Seongmobyeongwon	256
221.150.156.0/23	AS4766	Dongwondaehak	512

Nearby Ranges

BGP prefixes that overlap with 221.0.0.0/8

Range	ASN	Company	Num of IPs
221.144.0.0/12	AS4766	Korea Telecom	1,048,576
221.240.0.0/12	AS17506	ARTERIA Networks Corporation	1,048,576
221.144.0.0/12	AS152214	Korea Telecom	1,048,576
221.144.0.0/12	AS9856	Korea Telecom	1,048,576
221.176.0.0/13	AS9808	China Mobile Communications Corporation	524,288
221.224.0.0/13	AS4809	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS137702	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS4134	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS23650	CHINANET jiangsu province network	524,288
221.176.0.0/13	AS139080	China Mobile Communications Corporation	524,288
221.160.0.0/13	AS4766	Korea Telecom	524,288
221.224.0.0/13	AS146966	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS140292	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS134770	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
221.176.0.0/13	AS56042	China Mobile Communications Corporation	524,288
221.184.0.0/13	AS4713	NTT DOCOMO BUSINESS,Inc.	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
221.176.0.0/13	AS56048	China Mobile Communications Corporation	524,288
221.176.0.0/13	AS132510	China Mobile Communications Corporation	524,288
221.216.0.0/13	AS4808	China Unicom Beijing province network	524,288
221.176.0.0/13	AS56046	China Mobile Communications Corporation	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
221.224.0.0/13	AS138950	CHINANET jiangsu province network	524,288
221.224.0.0/13	AS137697	CHINANET jiangsu province network	524,288
221.232.0.0/14	AS58563	CHINANET Hubei province network	262,144
221.232.0.0/14	AS4134	CHINANET Hubei province network	262,144
221.140.0.0/14	AS9318	SK Broadband Co Ltd	262,144
221.124.0.0/14	AS9304	HGC Global Communications Limited	262,144
221.200.0.0/14	AS4837	China Unicom Liaoning Province Network	262,144
221.130.0.0/15	AS9808	China Mobile Communications Corporation	131,072
221.204.0.0/15	AS4837	China Unicom Shanxi Province Network	131,072
221.214.0.0/15	AS4837	China Unicom Shandong province network	131,072
221.8.0.0/15	AS4837	China Unicom JILIN province network	131,072
221.130.0.0/15	AS56041	China Mobile Communications Corporation	131,072
221.138.0.0/15	AS9318	SK Broadband Co Ltd	131,072
221.130.0.0/15	AS56042	China Mobile Communications Corporation	131,072
221.170.0.0/15	AS2518	BIGLOBE Inc.	131,072
221.6.0.0/16	AS140717	China Unicom Jiangsu province network	65,536
221.168.0.0/16	AS4766	Korea Telecom	65,536
221.117.0.0/16	AS17506	ARTERIA Networks Corporation	65,536
221.115.0.0/16	AS17506	ARTERIA Networks Corporation	65,536
221.114.0.0/16	AS17506	ARTERIA Networks Corporation	65,536
221.112.0.0/16	AS17506	ARTERIA Networks Corporation	65,536
221.129.0.0/16	AS23841	TIANJIN BROADCAST & TV NETWORK CO. LTD	65,536
221.119.0.0/16	AS2516	KDDI CORPORATION	65,536
221.116.0.0/16	AS17506	ARTERIA Networks Corporation	65,536

Hosted domains

There are 1,049 domain names hosted across 520 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
221.150.239.84	bioinsurance.co.kr	13
221.150.76.99	orientgenia.com	13
221.144.86.1	xn--om3bv0hite4qt.com	9
221.146.142.41	sunwoo-tech.com	9
221.148.3.234	in4al.com	9
221.144.61.90	dongramy.com	8
221.144.57.45	freewaterad.com	6
221.150.239.81	chacares.co.kr	6
221.150.229.149	hatsunemiku.net	6
221.144.61.81	yellowhealing.com	6
221.149.101.250	ensvil.com	6
221.149.71.17	gorocat.net	6
221.146.70.208	fonts.kr	5
221.146.140.102	lohas4u.kr	5
221.151.221.23	full-stack.today	4
221.148.244.3	magicn.com	4
221.150.209.41	idaesoon.or.kr	3
221.144.10.68	notallinone.site	3
221.150.162.18	lucent.me	3
221.148.23.152	everybooks.net	3

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

243,687 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
221.150.118.198	AS4766 Korea Telecom	`1.10ms` from Seoul, KR
221.150.45.62	AS4766 Korea Telecom	`1.25ms` from Seoul, KR
221.150.84.226	AS4766 Korea Telecom	`1.00ms` from Seoul, KR
221.150.72.8	AS4766 Korea Telecom	`1.18ms` from Seoul, KR
221.150.66.1	AS4766 Korea Telecom	`2.01ms` from Seoul, KR
221.150.123.53	AS4766 Korea Telecom	`1.42ms` from Seoul, KR
221.150.141.1	AS4766 Korea Telecom	`1.55ms` from Seoul, KR
221.150.180.124	AS4766 Korea Telecom	`1.90ms` from Seoul, KR
221.150.182.17	AS4766 Korea Telecom	`1.65ms` from Seoul, KR
221.150.130.1	AS4766 Korea Telecom	`1.54ms` from Seoul, KR
221.150.174.161	AS4766 Korea Telecom	`1.45ms` from Seoul, KR
221.150.85.150	AS4766 Korea Telecom	`1.32ms` from Seoul, KR
221.150.127.126	AS4766 Korea Telecom	`1.31ms` from Seoul, KR
221.150.140.137	AS4766 Korea Telecom	`1.30ms` from Seoul, KR
221.150.70.126	AS4766 Korea Telecom	`1.28ms` from Seoul, KR
221.150.178.190	AS4766 Korea Telecom	`2.12ms` from Seoul, KR
221.150.83.229	AS4766 Korea Telecom	`0.84ms` from Seoul, KR
221.150.80.92	AS4766 Korea Telecom	`1.22ms` from Seoul, KR
221.150.164.65	AS4766 Korea Telecom	`1.48ms` from Seoul, KR
221.150.153.30	AS4766 Korea Telecom	`1.61ms` from Seoul, KR
221.150.193.252	AS4766 Korea Telecom	`1.29ms` from Seoul, KR
221.150.99.131	AS4766 Korea Telecom	`1.17ms` from Seoul, KR
221.150.90.125	AS4766 Korea Telecom	`0.89ms` from Seoul, KR
221.150.50.254	AS4766 Korea Telecom	`1.09ms` from Seoul, KR
221.150.74.45	AS4766 Korea Telecom	`1.08ms` 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
97.129.186.221	AS6167 Verizon Business	`18.76ms` from Atlanta, US
172.78.230.93	AS5650 Frontier Communications of America, Inc.	`12.61ms` from Chicago, US
203.83.185.237	AS17471 Grameen Cybernet Ltd. Bangladesh. AS for local peering and transit. Dhaka	`0.29ms` from Dhaka, BD
63.33.252.125	AS16509 Amazon.com, Inc.	`0.17ms` from Dublin, IE
81.56.185.61	AS29447 SCALEWAY S.A.S.	`2.04ms` from Milan, IT
46.183.183.61	AS197453 Biz Telecom LLC	`0.44ms` from Moscow, RU
183.152.234.29	AS4134 CHINANET-BACKBONE	`7.99ms` from Ningbo, CN
88.182.36.157	AS12322 Free SAS	`16.59ms` from Paris, FR
100.24.107.77	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
2.45.188.253	AS30722 Vodafone Italia S.p.A.	`7.37ms` from Rome, IT
189.146.155.173	AS8151 UNINET	`3.96ms` from Santiago de Queretaro, MX
75.150.1.77	AS7922 Comcast Cable Communications, LLC	`9.75ms` from Seattle, US
149.32.193.189	AS26577 BAE Systems Inc.	`13.96ms` from Ashburn, US
37.46.157.93	AS57677 SINTELEC INFORMATICA, S.L.	`10.74ms` from Barcelona, ES
60.194.136.173	AS4808 China Unicom Beijing Province Network	`6.61ms` from Beijing, CN
205.220.213.205	AS55039 Fatbeam, LLC	`0.52ms` from Bend, US
73.68.112.45	AS7922 Comcast Cable Communications, LLC	`9.88ms` from Boston, US
115.130.126.157	AS7545 TPG Telecom Limited	`1.81ms` from Brisbane, AU
196.130.30.237	AS24835 Vodafone Data	`16.77ms` from Cairo, EG
207.132.224.125	AS721 United States Department of Defense (DoD)	`9.97ms` from Dallas, US
202.134.204.253	AS17648 Hughes Communications India Private Limited	`3.20ms` from Delhi, IN
54.75.183.221	AS16509 Amazon.com, Inc.	`0.21ms` from Dublin, IE
182.46.132.173	AS4134 CHINANET-BACKBONE	`6.69ms` from Jinan, CN
68.198.254.93	AS6128 Cablevision Systems Corp.	`9.37ms` from New York City, US
88.190.97.253	AS12322 Free SAS	`2.18ms` from Paris, FR

Traceroute

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

traceroute -a -n -q1 -f3 -m11 221.149.190.127

traceroute to 221.149.190.127 (221.149.190.127): 11 hops max, 52 byte packets

3 [AS35625] 45.15.206.49 3.16 ms

4 *

5 *

6 [AS3356] 4.68.37.206 138.156 ms

7 *

8 [AS4766] 112.174.91.225 260.93 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Lille, FR

On December 14th 2025

What are IP address ranges?

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