1. All IP Ranges
  2. 221.0.0.0/8
  3. 221.157.0.0/16
  4. AS4766  | 221.157.112.0/22

221.157.112.0/22

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 221.157.112.0/22

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 221.157.0.0/16

Range ASN Company Num of IPs
221.144.0.0/12 AS10184 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 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
221.144.0.0/12 AS9856 Korea Telecom 1,048,576

Hosted domains

There are no domains currently hosted on this ASN.

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

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

IP Address ASN Details
221.157.112.242 AS4766 Korea Telecom 4.46ms 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
85.149.56.22 AS5390 EuroNet 0.98ms from Amsterdam, NL
96.7.4.70 AS16625 Akamai Technologies, Inc. 0.40ms from Bogota, CO
3.23.131.70 AS16509 Amazon.com, Inc. 0.68ms from Columbus, US
78.70.47.182 AS3301 Telia Company AB 2.28ms from Goeteborg, SE
107.141.155.214 AS7018 AT&T Enterprises, LLC 2.17ms from Houston, US
107.143.151.166 AS7018 AT&T Enterprises, LLC 2.65ms from Los Angeles, US
95.126.232.134 AS3352 TELEFONICA DE ESPANA S.A.U. 9.27ms from Madrid, ES
112.201.84.150 AS9299 Philippine Long Distance Telephone Company 3.46ms from Manila, PH
70.91.14.102 AS7922 Comcast Cable Communications, LLC 9.37ms from Morris Plains, US
83.239.41.54 AS25490 PJSC Rostelecom 16.40ms from Moscow, RU
27.118.95.182 AS17573 SK Broadband Co Ltd 11.17ms from Seoul, KR
103.133.129.22 AS135432 Visa Information Technology Beijing Co. Ltd. 3.71ms from Shanghai, CN
52.69.138.38 AS16509 Amazon.com, Inc. 0.18ms from Tokyo, JP
174.104.161.38 AS10796 Charter Communications Inc 10.80ms from Toronto, CA
99.227.123.38 AS812 Rogers Communications Canada Inc. 5.85ms from Toronto, CA
24.3.128.22 AS7922 Comcast Cable Communications, LLC 10.38ms from Ashburn, US
173.13.204.22 AS7922 Comcast Cable Communications, LLC 6.54ms from Ashburn, US
16.145.56.70 AS16509 Amazon.com, Inc. 0.53ms from Boardman, US
191.223.194.134 AS8167 V tal 15.88ms from Curitiba, BR
18.199.121.54 AS16509 Amazon.com, Inc. 0.17ms from Frankfurt am Main, DE
222.87.35.38 AS4134 CHINANET-BACKBONE 8.41ms from Guiyang, CN
86.115.20.246 AS1759 Telia Finland Oyj 1.07ms from Helsinki, FI
81.99.234.118 AS5089 Virgin Media Limited 8.28ms from London, GB
90.242.130.150 AS5378 Vodafone Limited 8.23ms from London, GB
50.73.147.22 AS7922 Comcast Cable Communications, LLC 6.13ms from Miami, US

Traceroute

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

$
traceroute -a -n -q1 221.157.112.242
traceroute to 221.157.112.242 (221.157.112.242): 64 hops max, 52 byte packets
1 [AS31898] 140.91.214.7 0.071 ms
3 *
4 *
6 *
7 *
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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