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  2. 221.0.0.0/8
  3. 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

Overlapping Ranges

BGP prefixes that are contained by 221.144.0.0/12

Range ASN Company Num of IPs
221.154.89.0/24 AS4766 Inhagongeopjeonmundaehak 256
221.149.141.0/24 AS10185 (ju)hanaeunhaeng 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
221.158.73.0/24 AS17576 Jaedanbeopin hangukyeongujaedan 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
221.154.87.0/24 AS4766 Inhagongeopjeonmundaehak 256
221.144.37.0/24 AS4766 Nambudaehakgyo 256
221.159.130.0/24 AS4766 Jeonbukdaehakgyo pyeongsaenggyoyukwon 256
221.157.116.0/24 AS4766 Gyemyeongmunhwadaehakgyojang 256
221.154.90.0/24 AS4766 Inhagongeopjeonmundaehak 256
221.159.186.0/24 AS4766 Jeonjubijeondaehak 256
221.157.126.0/24 AS4766 Gyeongbukgwahakdaehakgyo 256
221.154.82.0/24 AS4766 Inhagongeopjeonmundaehak 256
221.154.88.0/24 AS4766 Inhagongeopjeonmundaehak 256
221.154.84.0/24 AS4766 Inhagongeopjeonmundaehak 256
221.154.86.0/24 AS4766 Inhagongeopjeonmundaehak 256
221.147.53.0/24 AS4766 Seongmobyeongwon 256
221.154.83.0/24 AS4766 Inhagongeopjeonmundaehak 256
221.157.127.0/24 AS4766 Gyeongbukgwahakdaehakgyo 256
221.147.55.0/24 AS4766 Seongmobyeongwon 256
221.147.54.0/24 AS4766 Seongmobyeongwon 256
221.147.51.0/24 AS4766 Seongmobyeongwon 256
221.154.85.0/24 AS4766 Inhagongeopjeonmundaehak 256
221.145.224.0/24 AS4766 (hak)toldaehakgyodaejeonseongmobyeongwon 256
221.153.249.0/24 AS4766 Dongwondaehak 256
221.147.52.0/24 AS4766 Seongmobyeongwon 256
221.150.21.0/24 AS10184 (sa)saemaeulgeumgoyeonhaphoe 256
221.146.17.0/24 AS4766 Sejongsaibeodaehakgyo 256
221.159.187.0/24 AS4766 Jeonjubijeondaehak 256
221.144.152.0/24 AS55622 Chuncheongyoyukdaehak 256
221.159.210.0/24 AS55622 Chuncheongyoyukdaehak 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
221.64.0.0/11 AS17676 Japan Nation-wide Network of Softbank Corp. 2,097,152
221.16.0.0/12 AS17676 Japan Nation-wide Network of Softbank Corp. 1,048,576
221.96.0.0/12 AS17676 Japan Nation-wide Network of Softbank Corp. 1,048,576
221.240.0.0/12 AS17506 ARTERIA Networks Corporation 1,048,576
221.48.0.0/12 AS17676 Japan Nation-wide Network of Softbank Corp. 1,048,576
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
221.224.0.0/13 AS134756 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS131325 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS138950 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS140292 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS56044 China Mobile Communications Corporation 524,288
221.176.0.0/13 AS132510 China Mobile Communications Corporation 524,288
221.176.0.0/13 AS9808 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS4809 CHINANET jiangsu province network 524,288
221.160.0.0/13 AS4766 Korea Telecom 524,288
221.224.0.0/13 AS58777 CHINANET jiangsu province network 524,288
221.184.0.0/13 AS4713 NTT DOCOMO BUSINESS,Inc. 524,288
221.176.0.0/13 AS56048 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS134770 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS23650 CHINANET jiangsu province network 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 AS146966 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS139080 China Mobile Communications Corporation 524,288
221.176.0.0/13 AS141425 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS4134 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS24445 China Mobile Communications Corporation 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
221.32.0.0/13 AS17676 Japan Nation-wide Network of Softbank Corp. 524,288
221.140.0.0/14 AS9318 SK Broadband Co Ltd 262,144
221.124.0.0/14 AS9304 HGC Global Communications Limited 262,144
221.232.0.0/14 AS58563 CHINANET Hubei province network 262,144
221.232.0.0/14 AS4134 CHINANET Hubei province network 262,144
221.200.0.0/14 AS4837 China Unicom Liaoning Province Network 262,144
221.40.0.0/14 AS17676 Japan Nation-wide Network of Softbank Corp. 262,144
221.232.0.0/14 AS58777 CHINANET Hubei province network 262,144
221.8.0.0/15 AS4837 China Unicom JILIN province network 131,072
221.204.0.0/15 AS4837 China Unicom Shanxi Province Network 131,072
221.170.0.0/15 AS2518 BIGLOBE Inc. 131,072
221.138.0.0/15 AS9318 SK Broadband Co Ltd 131,072
221.130.0.0/15 AS9808 China Mobile Communications Corporation 131,072
221.214.0.0/15 AS4837 China Unicom Shandong province network 131,072
221.130.0.0/15 AS56042 China Mobile Communications Corporation 131,072
221.130.0.0/15 AS56041 China Mobile Communications Corporation 131,072

Hosted domains

There are 1,809 domain names hosted across 881 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP

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

538,521 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
221.147.253.23 AS4766 Korea Telecom 2.10ms from Incheon, KR
221.147.246.182 AS4766 Korea Telecom 1.56ms from Incheon, KR
221.147.244.126 AS4766 Korea Telecom 1.25ms from Seoul, KR
221.147.128.183 AS4766 Korea Telecom 2.88ms from Seoul, KR
221.147.206.200 AS4766 Korea Telecom 1.46ms from Seoul, KR
221.147.179.51 AS4766 Korea Telecom 2.22ms from Seoul, KR
221.147.219.63 AS4766 Korea Telecom 1.54ms from Seoul, KR
221.147.129.80 AS4766 Korea Telecom 1.53ms from Seoul, KR
221.147.236.129 AS4766 Korea Telecom 1.43ms from Seoul, KR
221.148.19.62 AS4766 Korea Telecom 1.10ms from Seoul, KR
221.147.207.152 AS4766 Korea Telecom 1.63ms from Seoul, KR
221.147.167.207 AS4766 Korea Telecom 2.01ms from Seoul, KR
221.147.242.170 AS4766 Korea Telecom 1.35ms from Seoul, KR
221.147.185.1 AS4766 Korea Telecom 1.92ms from Seoul, KR
221.147.199.129 AS4766 Korea Telecom 1.52ms from Seoul, KR
221.147.193.88 AS4766 Korea Telecom 1.78ms from Seoul, KR
221.147.96.170 AS4766 Korea Telecom 1.17ms from Seoul, KR
221.147.111.49 AS4766 Korea Telecom 1.16ms from Seoul, KR
221.147.118.254 AS4766 Korea Telecom 1.30ms from Seoul, KR
221.147.169.105 AS4766 Korea Telecom 1.82ms from Seoul, KR
221.147.250.41 AS4766 Korea Telecom 1.27ms from Seoul, KR
221.147.200.163 AS4766 Korea Telecom 1.96ms from Seoul, KR
221.147.142.44 AS4766 Korea Telecom 1.73ms from Seoul, KR
221.147.113.187 AS4766 Korea Telecom 1.15ms from Seoul, KR
221.147.239.143 AS4766 Korea Telecom 1.24ms 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
89.207.131.220 AS62370 Snel.com B.V. 1.39ms from Amsterdam, NL
47.13.237.140 AS20115 Charter Communications LLC 14.28ms from Atlanta, US
172.73.25.252 AS11426 Charter Communications Inc 6.56ms from Charlotte, US
115.225.220.172 AS4134 CHINANET-BACKBONE 7.47ms from Hangzhou, CN
113.173.34.92 AS45899 VNPT Corp 1.54ms from Ho Chi Minh City, VN
113.10.199.220 AS9269 Hong Kong Broadband Network Ltd. 1.24ms from Hong Kong, HK
15.185.154.108 AS16509 Amazon.com, Inc. 0.13ms from Manama, BH
81.167.206.188 AS29695 Lyse Tele AS 7.74ms from Oslo, NO
52.76.62.92 AS16509 Amazon.com, Inc. 0.13ms from Singapore, SG
92.68.6.76 AS1136 KPN B.V. 0.44ms from Amsterdam, NL
8.228.85.236 AS396982 Google LLC 0.15ms from Ashburn, US
76.141.89.156 AS7922 Comcast Cable Communications, LLC 6.84ms from Chicago, US
84.167.44.12 AS3320 Deutsche Telekom AG 3.37ms from Hamburg, DE
85.183.21.108 AS6805 Telefonica Germany GmbH & Co.OHG 4.95ms from Hamburg, DE
144.31.82.220 AS207957 SERV.HOST GROUP LTD 0.80ms from Helsinki, FI
35.215.191.236 AS15169 Google LLC 0.17ms from Hong Kong, HK
125.16.122.124 AS9498 BHARTI Airtel Ltd. 0.78ms from Hyderabad, IN
27.113.84.28 AS9781 GREEN CABLE TELEVISION STATION 5.83ms from Incheon, KR
165.90.90.12 AS37110 Moztel LDA 0.92ms from Maputo, MZ
69.121.172.140 AS6128 Cablevision Systems Corp. 6.57ms from New York City, US
193.252.211.156 AS3215 Orange S.A. 2.33ms from Paris, FR
4.154.158.76 AS8075 Microsoft Corporation 0.41ms from Quincy, US
54.81.249.108 AS14618 Amazon.com, Inc. 0.23ms from Reston, US
106.15.171.220 AS37963 Hangzhou Alibaba Advertising Co.,Ltd. 2.58ms from Shanghai, CN
137.26.36.188 AS20115 Charter Communications LLC 5.38ms from St. Louis, US

Traceroute

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

$
traceroute -a -n -q1 221.159.131.145
traceroute to 221.159.131.145 (221.159.131.145): 64 hops max, 52 byte packets
2 *
3 *
5 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in Seoul, KR
On

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