1. All IP Ranges
  2. 221.0.0.0/8
  3. 221.145.0.0/16
  4. AS45400  | 221.145.178.0/24

221.145.178.0/24

AS45400  ·  Korea Telecom

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Summary

Country South Korea
Domain kt.com
ASN AS45400
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 221.145.178.0/24

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 221.145.0.0/16

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 is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
221.145.178.240 nhc.go.kr 1

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

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

IP Address ASN Details
221.145.178.1 AS45400 Korea Telecom 5.10ms 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
92.68.127.216 AS1136 KPN B.V. 3.17ms from Amsterdam, NL
32.214.29.8 AS46690 Southern New England Telephone Company and SNET America, Inc. 11.55ms from Ashburn, US
20.241.134.248 AS8075 Microsoft Corporation 0.42ms from Ashburn, US
120.147.91.40 AS1221 Telstra Limited 5.80ms from Brisbane, AU
108.69.123.248 AS7018 AT&T Enterprises, LLC 3.30ms from Chicago, US
51.75.155.152 AS16276 OVH SAS 0.13ms from Frankfurt am Main, DE
62.245.153.168 AS8767 M-net Telekommunikations GmbH 4.30ms from Frankfurt am Main, DE
168.98.71.56 AS17130 Jones Day 5.19ms from Indianapolis, US
186.26.105.56 AS270939 2MM2 SERVIÇOS DE TELECOMUNICAÇOES 16.62ms from Joao Pessoa, BR
68.183.36.56 AS14061 DigitalOcean, LLC 0.28ms from London, GB
47.143.8.200 AS5650 Frontier Communications of America, Inc. 9.70ms from Los Angeles, US
90.251.211.56 AS5378 Vodafone Limited 5.19ms from Manchester, GB
36.139.53.200 AS56046 China Mobile communications corporation 3.78ms from Nanjing, CN
165.238.97.8 AS10770 AT&T Enterprises, LLC 0.15ms from Philadelphia, US
186.108.246.8 AS7303 Telecom Argentina S.A. 6.70ms from Rosario, AR
201.105.5.72 AS8151 UNINET 11.09ms from Santiago de Queretaro, MX
85.187.212.184 AS198482 Pernik Lan Ltd. 1.13ms from Sofia, BG
43.212.152.216 AS16509 Amazon.com, Inc. 0.21ms from Taipei, TW
2.144.5.152 AS44244 Iran Cell Service and Communication Company 18.36ms from Yerevan, AM
195.229.110.24 AS5384 Emirates Internet 4.92ms from Al Fujairah City, AE
24.98.223.248 AS7922 Comcast Cable Communications, LLC 5.02ms from Atlanta, US
177.157.104.40 AS18881 TELEFÔNICA BRASIL S.A 12.35ms from Belo Horizonte, BR
8.47.20.8 AS21646 Fisher Investments Inc. 0.93ms from Dallas, US
52.29.145.152 AS16509 Amazon.com, Inc. 0.17ms from Frankfurt am Main, DE
91.22.213.72 AS3320 Deutsche Telekom AG 3.03ms from Frankfurt am Main, DE

Traceroute

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

$
traceroute -a -n -q1 221.145.178.1
traceroute to 221.145.178.1 (221.145.178.1): 64 hops max, 52 byte packets
3 *
4 *
5 *
6 *
7 [AS3786] 1.208.114.170 2.555 ms
8 [AS3786] 1.213.104.106 13.468 ms
10 *
11 *
12 *
13 [] 211.255.110.66 3.809 ms
14 [] 211.255.110.74 3.843 ms
15 [] 211.255.120.142 4.184 ms
16 [AS45400] 221.145.178.1 7.897 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.

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