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  2. 221.0.0.0/8
  3. AS4766  | 221.152.0.0/13

221.152.0.0/13

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:         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 contain 221.152.0.0/13

Range ASN Company Num of IPs
221.144.0.0/12 AS9856 Korea Telecom 1,048,576
221.144.0.0/12 AS10185 Korea Telecom 1,048,576
221.144.0.0/12 AS152214 Korea Telecom 1,048,576
221.144.0.0/12 AS17576 Korea Telecom 1,048,576
221.144.0.0/12 AS17851 Korea Telecom 1,048,576
221.144.0.0/12 AS38405 Korea Telecom 1,048,576
221.144.0.0/12 AS38697 Korea Telecom 1,048,576
221.144.0.0/12 AS45360 Korea Telecom 1,048,576
221.144.0.0/12 AS45400 Korea Telecom 1,048,576
221.144.0.0/12 AS4766 Korea Telecom 1,048,576
221.144.0.0/12 AS10184 Korea Telecom 1,048,576
221.144.0.0/12 AS55622 Korea Telecom 1,048,576
221.144.0.0/12 AS9526 Korea Telecom 1,048,576
221.144.0.0/12 AS9850 Korea Telecom 1,048,576

Nearby Ranges

BGP prefixes that overlap with 221.0.0.0/8

Range ASN Company Num of IPs
221.144.0.0/12 AS152214 Korea Telecom 1,048,576
221.144.0.0/12 AS55622 Korea Telecom 1,048,576
221.144.0.0/12 AS10185 Korea Telecom 1,048,576
221.144.0.0/12 AS38697 Korea Telecom 1,048,576
221.144.0.0/12 AS45400 Korea Telecom 1,048,576
221.144.0.0/12 AS17851 Korea Telecom 1,048,576
221.240.0.0/12 AS17506 ARTERIA Networks Corporation 1,048,576
221.144.0.0/12 AS17576 Korea Telecom 1,048,576
221.144.0.0/12 AS45360 Korea Telecom 1,048,576
221.144.0.0/12 AS10184 Korea Telecom 1,048,576
221.144.0.0/12 AS38405 Korea Telecom 1,048,576
221.144.0.0/12 AS9850 Korea Telecom 1,048,576
221.144.0.0/12 AS9526 Korea Telecom 1,048,576
221.144.0.0/12 AS9856 Korea Telecom 1,048,576
221.144.0.0/12 AS4766 Korea Telecom 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 720 domain names hosted across 326 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
221.153.35.130 bigbom.kr 129
221.156.137.137 koreazinc.or.kr 34
221.156.137.135 sajounion.or.kr 24
221.157.125.147 gsmarathon.kr 11
221.152.146.148 xn--od1bzk85an1nbuujwrtd41d.kr 10
221.156.152.185 namusup.com 8
221.156.137.102 scculture.or.kr 7
221.153.222.19 dev-coretec.co.kr 4
221.156.47.200 systembus.com 4
221.155.122.114 jlabstudios.com 3
221.155.122.98 weddingwish.co.kr 3
221.155.158.12 lumincompany.com 3
221.156.137.136 hlssu.or.kr 3
221.157.9.241 sgsoft.co.kr 3
221.157.68.100 satec.co.kr 3
221.156.137.141 xn--3e0bs0fh7bm42aumcg7br18awnetdrn.kr 3
221.156.136.182 heplotus.com 3
221.156.241.86 snaptoonwarehouse.com 2
221.153.201.162 soringames.co.kr 2
221.152.242.6 cadwin.co.kr 2

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

296,123 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
221.153.238.105 AS4766 Korea Telecom 1.42ms from Seoul, KR
221.154.26.254 AS4766 Korea Telecom 1.28ms from Seoul, KR
221.154.44.169 AS4766 Korea Telecom 1.29ms from Seoul, KR
221.153.218.30 AS4766 Korea Telecom 1.70ms from Seoul, KR
221.154.15.254 AS4766 Korea Telecom 1.09ms from Seoul, KR
221.153.216.233 AS4766 Korea Telecom 1.63ms from Seoul, KR
221.153.204.36 AS4766 Korea Telecom 1.55ms from Seoul, KR
221.154.7.28 AS4766 Korea Telecom 1.45ms from Seoul, KR
221.153.231.134 AS4766 Korea Telecom 1.22ms from Seoul, KR
221.154.62.126 AS4766 Korea Telecom 1.30ms from Seoul, KR
221.154.28.147 AS4766 Korea Telecom 1.45ms from Seoul, KR
221.154.14.115 AS4766 Korea Telecom 1.49ms from Seoul, KR
221.154.4.129 AS4766 Korea Telecom 1.24ms from Seoul, KR
221.153.196.14 AS4766 Korea Telecom 1.37ms from Seoul, KR
221.154.63.220 AS4766 Korea Telecom 1.36ms from Seoul, KR
221.153.224.95 AS4766 Korea Telecom 1.43ms from Seoul, KR
221.154.42.217 AS4766 Korea Telecom 1.59ms from Seoul, KR
221.154.33.71 AS4766 Korea Telecom 1.10ms from Seoul, KR
221.153.225.35 AS4766 Korea Telecom 1.47ms from Seoul, KR
221.154.69.39 AS4766 Korea Telecom 1.29ms from Seoul, KR
221.154.34.168 AS4766 Korea Telecom 1.28ms from Seoul, KR
221.153.198.135 AS4766 Korea Telecom 1.67ms from Seoul, KR
221.153.208.36 AS4766 Korea Telecom 1.85ms from Seoul, KR
221.154.9.8 AS4766 Korea Telecom 1.35ms from Seoul, KR
221.154.76.162 AS4766 Korea Telecom 1.18ms 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
9.169.217.141 AS8075 Microsoft Corporation 0.19ms from Boydton, US
156.193.8.29 AS8452 TE-AS 2.32ms from Cairo, EG
41.82.25.13 AS8346 SONATEL-AS Autonomous System 2.12ms from Dakar, SN
168.222.253.173 AS50053 Anton Levin 0.27ms from Helsinki, FI
204.11.168.253 AS11166 J2 Cloud Services, LLC 0.29ms from Los Angeles, US
71.57.149.189 AS7922 Comcast Cable Communications, LLC 4.04ms from Miami, US
93.186.60.77 AS49531 NetCom-R LLC 0.78ms from Moscow, RU
186.5.142.13 AS26426 Columbus Networks Panama 1.03ms from Panama, PA
92.173.96.45 AS3215 Orange S.A. 1.71ms from Paris, FR
212.210.54.45 AS3269 Telecom Italia S.p.A. 9.54ms from Rome, IT
200.24.117.205 AS271679 RENOVTEC SERVICOS DE TECNOLOGIA EIRELI 15.96ms from Sao Paulo, BR
69.117.197.173 AS6128 Cablevision Systems Corp. 16.05ms from Secaucus, US
121.133.65.157 AS4766 Korea Telecom 1.44ms from Seoul, KR
1.225.247.173 AS9318 SK Broadband Co Ltd 7.40ms from Seoul, KR
163.21.209.253 AS1659 Taiwan Academic Network (TANet) Information Center 1.73ms from Taipei, TW
220.211.80.125 AS2527 Sony Network Communications Inc. 3.17ms from Tokyo, JP
83.111.128.29 AS5384 Emirates Internet 3.62ms from Al Fujairah City, AE
200.238.138.125 AS10881 FUNPAR - Fundacao da UFPR para o DCTC 0.18ms from Curitiba, BR
78.43.137.253 AS3209 Vodafone GmbH 5.46ms from Frankfurt am Main, DE
217.77.211.61 AS31272 WildPark Co 8.60ms from Kyiv, UA
134.213.156.173 AS15395 Rackspace Ltd. 1.25ms from London, GB
68.85.58.125 AS7922 Comcast Cable Communications, LLC 6.46ms from Miami, US
217.58.231.125 AS3269 Telecom Italia S.p.A. 4.76ms from Milan, IT
142.68.254.77 AS577 Bell Canada 11.91ms from Montreal, CA
186.221.80.109 AS28573 Claro NXT Telecomunicacoes Ltda 5.52ms from Rio de Janeiro, BR

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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