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  2. 221.0.0.0/8
  3. 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 AS9856 Korea Telecom 1,048,576
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
221.224.0.0/13 AS137697 CHINANET jiangsu province network 524,288
221.184.0.0/13 AS4713 NTT DOCOMO BUSINESS,Inc. 524,288
221.224.0.0/13 AS23650 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS132510 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS138950 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
221.224.0.0/13 AS131325 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS141425 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS146966 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS9808 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS140292 CHINANET jiangsu province network 524,288
221.176.0.0/13 AS139080 China Mobile Communications Corporation 524,288
221.224.0.0/13 AS134770 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
221.160.0.0/13 AS4766 Korea Telecom 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 AS56048 China Mobile Communications Corporation 524,288
221.176.0.0/13 AS24445 China Mobile Communications Corporation 524,288
221.216.0.0/13 AS4808 China Unicom Beijing 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
221.140.0.0/14 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
221.200.0.0/14 AS4837 China Unicom Liaoning Province Network 262,144
221.232.0.0/14 AS4134 CHINANET Hubei province network 262,144
221.214.0.0/15 AS4837 China Unicom Shandong province network 131,072
221.130.0.0/15 AS9808 China Mobile Communications Corporation 131,072
221.170.0.0/15 AS2518 BIGLOBE Inc. 131,072
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
221.130.0.0/15 AS56042 China Mobile Communications Corporation 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
221.119.0.0/16 AS2516 KDDI CORPORATION 65,536
221.6.0.0/16 AS140717 China Unicom Jiangsu province network 65,536
221.169.0.0/16 AS4780 Digital United I 65,536
221.168.0.0/16 AS4766 Korea Telecom 65,536
221.10.0.0/16 AS4837 China Unicom SiChuan province network 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

Hosted domains

There are 1,054 domain names hosted across 512 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
221.150.86.1 kosca26.or.kr 18
221.147.192.205 goiwc.co.kr 11
221.148.3.234 xn--2n1bo4pj8hysam30b.com 9
221.150.86.6 kosca38.or.kr 9
221.144.61.81 nice-data.com 6
221.150.229.149 hatsunemiku.net 6
221.146.6.184 nemonuri.net 6
221.149.101.250 soonseok.or.kr 6
221.150.36.87 xn--3i0bl5io3mn2dba.com 5
221.149.140.64 minwook.kim 5
221.150.239.82 chaum.asia 5
221.150.96.204 static-image.shop 4
221.150.174.74 moduin.co.kr 4
221.148.244.3 magicn.com 4
221.144.136.239 gwsgc.kr 3
221.150.162.18 cyclic.dev 3
221.150.209.41 idaesoon.or.kr 3
221.145.240.248 xn--s39a0hwn433bdua.com 3
221.148.25.234 heptagon-market-api.store 3
221.144.61.19 allaboutbody.co.kr 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

239,932 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
221.145.79.128 AS4766 Korea Telecom 1.45ms from Seoul, KR
221.145.150.120 AS4766 Korea Telecom 5.54ms from Seoul, KR
221.145.93.190 AS4766 Korea Telecom 1.51ms from Seoul, KR
221.145.60.126 AS4766 Korea Telecom 1.36ms from Seoul, KR
221.145.40.117 AS4766 Korea Telecom 1.30ms from Seoul, KR
221.145.138.175 AS4766 Korea Telecom 4.64ms from Seoul, KR
221.145.90.254 AS4766 Korea Telecom 1.02ms from Seoul, KR
221.145.142.120 AS4766 Korea Telecom 4.18ms from Seoul, KR
221.145.53.66 AS4766 Korea Telecom 1.50ms from Seoul, KR
221.145.192.231 AS4766 Korea Telecom 3.31ms from Seoul, KR
221.145.96.18 AS4766 Korea Telecom 1.72ms from Seoul, KR
221.145.185.129 AS4766 Korea Telecom 5.66ms from Seoul, KR
221.145.23.246 AS4766 Korea Telecom 1.45ms from Seoul, KR
221.145.97.146 AS4766 Korea Telecom 1.29ms from Seoul, KR
221.145.16.89 AS4766 Korea Telecom 1.39ms from Seoul, KR
221.145.62.161 AS4766 Korea Telecom 1.35ms from Seoul, KR
221.145.36.126 AS4766 Korea Telecom 1.38ms from Seoul, KR
221.145.189.171 AS4766 Korea Telecom 5.02ms from Seoul, KR
221.145.31.6 AS4766 Korea Telecom 1.34ms from Seoul, KR
221.145.46.234 AS4766 Korea Telecom 1.42ms from Seoul, KR
221.145.82.58 AS4766 Korea Telecom 1.43ms from Seoul, KR
221.145.24.13 AS4766 Korea Telecom 1.33ms from Seoul, KR
221.145.176.199 AS4766 Korea Telecom 3.14ms from Seoul, KR
221.145.67.105 AS4766 Korea Telecom 1.32ms from Seoul, KR
221.145.120.192 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
84.83.24.157 AS1136 KPN B.V. 2.42ms from Amsterdam, NL
174.85.178.221 AS20115 Charter Communications LLC 13.79ms from Atlanta, US
66.83.180.109 AS7029 Windstream Communications LLC 18.30ms from Atlanta, US
98.230.162.13 AS7922 Comcast Cable Communications, LLC 6.17ms from Atlanta, US
190.50.133.45 AS22927 Telefonica de Argentina 1.85ms from Buenos Aires, AR
157.250.175.221 AS3342 Cibicom A/S 0.39ms from Copenhagen, DK
79.226.41.237 AS3320 Deutsche Telekom AG 7.23ms from Frankfurt am Main, DE
176.208.1.173 AS12389 PJSC Rostelecom 12.65ms from Krasnoyarsk, RU
78.144.163.173 AS13285 TalkTalk Communications Limited 3.85ms from London, GB
185.7.149.77 AS34555 C.C.S. (Leeds) Ltd 0.68ms from London, GB
90.211.56.61 AS5607 Sky UK Limited 3.72ms from London, GB
80.175.179.29 AS8607 Digital Space Group Limited 16.72ms from London, GB
75.237.112.29 AS6167 Verizon Business 17.57ms from Los Angeles, US
188.78.209.13 AS12479 Orange Espagne SA 16.36ms from Madrid, ES
153.212.211.237 AS4713 NTT DOCOMO BUSINESS,Inc. 11.38ms from Osaka, JP
192.188.22.61 AS3443 ESnet 0.34ms from San Jose, US
182.216.206.109 AS17858 LG POWERCOMM 1.42ms from Seoul, KR
123.204.19.157 AS4780 Digital United Inc. 3.76ms from Taipei, TW
4.255.5.109 AS8075 Microsoft Corporation 0.37ms from Ashburn, US
76.17.75.205 AS7922 Comcast Cable Communications, LLC 5.85ms from Atlanta, US
218.246.66.93 AS18239 CAPNET 2.04ms from Beijing, CN
200.50.241.237 AS27964 RSO APOLO HIDALGO S.R.L. 0.81ms from Buenos Aires, AR
75.212.223.13 AS6167 Verizon Business 16.12ms from Chicago, US
34.131.239.189 AS396982 Google LLC 0.10ms from Delhi, IN
90.132.84.237 AS1257 Tele2 Sverige AB 3.87ms from Goeteborg, SE

Traceroute

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

$
traceroute -a -n -q1 221.144.0.38
traceroute to 221.144.0.38 (221.144.0.38): 64 hops max, 52 byte packets
1 [AS31898] 140.91.214.3 0.074 ms
3 *
4 *
5 [AS4766] 112.174.57.26 5.982 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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