1. All IP Ranges
  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

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 AS4766 Korea Telecom 524,288
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 AS131325 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS56048 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS4134 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS134770 CHINANET jiangsu province network 524,288
221.216.0.0/13 AS4808 China Unicom Beijing province network 524,288
221.176.0.0/13 AS24445 China Mobile Communications Corporation 524,288
221.160.0.0/13 AS18323 Korea Telecom 524,288
221.176.0.0/13 AS56040 China Mobile Communications Corporation 524,288
221.184.0.0/13 AS4713 NTT DOCOMO BUSINESS,Inc. 524,288
221.176.0.0/13 AS56042 China Mobile Communications Corporation 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
221.176.0.0/13 AS132510 China Mobile Communications Corporation 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
221.224.0.0/13 AS134756 CHINANET jiangsu province network 524,288
221.224.0.0/13 AS4809 CHINANET jiangsu province network 524,288
221.160.0.0/13 AS38422 Korea Telecom 524,288
221.176.0.0/13 AS56046 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
221.160.0.0/13 AS131101 Korea Telecom 524,288
221.232.0.0/14 AS58563 CHINANET Hubei province network 262,144
221.124.0.0/14 AS9304 HGC Global Communications Limited 262,144
221.140.0.0/14 AS9318 SK Broadband Co Ltd 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

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
221.147.12.187 AS4766 Korea Telecom 1.20ms from Seoul, KR
221.146.211.111 AS4766 Korea Telecom 1.31ms from Seoul, KR
221.146.173.195 AS4766 Korea Telecom 1.22ms from Seoul, KR
221.146.216.50 AS4766 Korea Telecom 1.24ms from Seoul, KR
221.146.240.27 AS4766 Korea Telecom 1.34ms from Seoul, KR
221.147.14.94 AS4766 Korea Telecom 1.23ms from Seoul, KR
221.147.65.113 AS4766 Korea Telecom 0.90ms from Seoul, KR
221.147.40.254 AS4766 Korea Telecom 1.16ms from Seoul, KR
221.147.60.16 AS4766 Korea Telecom 1.38ms from Seoul, KR
221.147.35.218 AS4766 Korea Telecom 1.34ms from Seoul, KR
221.146.218.14 AS4766 Korea Telecom 1.08ms from Seoul, KR
221.146.157.65 AS4766 Korea Telecom 1.43ms from Seoul, KR
221.147.42.241 AS4766 Korea Telecom 1.22ms from Seoul, KR
221.147.20.254 AS4766 Korea Telecom 1.25ms from Seoul, KR
221.147.26.126 AS4766 Korea Telecom 1.25ms from Seoul, KR
221.146.156.123 AS4766 Korea Telecom 1.28ms from Seoul, KR
221.146.180.194 AS4766 Korea Telecom 1.31ms from Seoul, KR
221.146.234.110 AS4766 Korea Telecom 1.32ms from Seoul, KR
221.147.57.254 AS4766 Korea Telecom 1.29ms from Seoul, KR
221.146.190.18 AS4766 Korea Telecom 1.33ms from Seoul, KR
221.147.64.241 AS4766 Korea Telecom 0.92ms from Seoul, KR
221.147.76.103 AS4766 Korea Telecom 1.27ms from Seoul, KR
221.146.212.3 AS4766 Korea Telecom 1.56ms from Seoul, KR
221.146.220.30 AS4766 Korea Telecom 1.06ms from Seoul, KR
221.146.194.22 AS4766 Korea Telecom 1.38ms 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
168.245.12.252 AS11377 SendGrid, Inc. 0.38ms from Ashburn, US
121.19.209.108 AS4837 CHINA UNICOM China169 Backbone 9.56ms from Beijing, CN
98.163.243.188 AS22773 Cox Communications Inc. 14.99ms from Dallas, US
93.187.60.252 AS48097 nobilia-Werke J. Stickling GmbH & Co. KG 13.11ms from Duesseldorf, DE
104.49.0.204 AS7018 AT&T Enterprises, LLC 5.46ms from Durham, US
154.218.171.44 AS137951 ASLINE LIMITED 0.73ms from Hong Kong, HK
172.111.141.188 AS9304 HGC Global Communications Limited 2.06ms from Hong Kong, HK
113.203.166.220 AS12479 Orange Espagne SA 1.52ms from Madrid, ES
73.58.250.76 AS7922 Comcast Cable Communications, LLC 8.71ms from Murfreesboro, US
191.197.129.60 AS26599 TELEFÔNICA BRASIL S.A 2.92ms from Novo Hamburgo, BR
58.81.253.220 AS17506 ARTERIA Networks Corporation 9.99ms from Osaka, JP
219.63.11.44 AS17676 SoftBank Corp. 3.88ms from Osaka, JP
85.162.163.12 AS28725 CETIN a.s. 0.24ms from Prague, CZ
14.76.39.188 AS4766 Korea Telecom 7.13ms from Seoul, KR
126.108.136.12 AS17676 SoftBank Corp. 7.18ms from Tokyo, JP
85.3.85.204 AS3303 Swisscom (Switzerland) Ltd 2.72ms from Zuerich, CH
181.122.118.236 AS23201 Telecel S.A. 8.36ms from Asuncion, PY
18.252.66.76 AS8987 Amazon Data Services Ireland Ltd 0.77ms from Columbus, US
187.133.180.172 AS8151 UNINET 5.21ms from Guadalajara, MX
223.199.4.76 AS4134 CHINANET-BACKBONE 3.86ms from Haikou, CN
14.188.234.236 AS45899 VNPT Corp 2.14ms from Hanoi, VN
86.160.21.220 AS2856 British Telecommunications PLC 5.17ms from London, GB
172.236.251.28 AS63949 Akamai Connected Cloud 0.20ms from Los Angeles, US
201.170.157.204 AS8151 UNINET 6.92ms from Los Angeles, US
188.78.52.204 AS12479 Orange Espagne SA 2.11ms from Madrid, ES

Traceroute

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

$
traceroute -a -n -q1 -f7 221.159.15.59
traceroute to 221.159.15.59 (221.159.15.59): 64 hops max, 52 byte packets
9 *
10 [AS4766] 221.159.15.59 5.155 ms
Measurement taken from IPinfo ProbeNet in Seoul, KR
On

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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