203.254.123.0/24

AS45400 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS45400
Registry	APNIC
ID	KORNET-KR

WHOIS Details

inetnum:        203.254.120.0 - 203.254.127.255
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:  2025-11-03T08:14:06Z
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:        203.254.120.0 - 203.254.127.255
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 203.254.0.0/16

Range	ASN	Company	Num of IPs
203.254.192.0/18	AS6619	SamsungSDS Inc.	16,384
203.254.128.0/19	AS7560	Jeonbuk National University	8,192
203.254.176.0/20	AS1237	KISTI	4,096
203.254.160.0/21	AS10070	KRISS SubDAEJONnetworks connected to backbone	2,048
203.254.172.0/23	AS4766	Korea Telecom	512
203.254.168.0/23	AS1237	KISTI	512
203.254.40.0/24	AS1237	KISTI	256
203.254.240.0/24	AS138380	VOLVO CONSTRUCTION EQUIPMENT KOREA LTD	256
203.254.170.0/24	AS17861	KISTI	256
203.254.9.0/24	AS3786	Korea Internet Security Agency	256
203.254.171.0/24	AS4766	Korea Telecom	256
203.254.241.0/24	AS6619	SamsungSDS Inc.	256
203.254.51.0/24	AS9494	National Infomation Society Agency	256
203.254.179.0/24	AS1237	National Research Council for	256
203.254.180.0/24	AS1237	Science and Technology Policy Institute	256
203.254.181.0/24	AS1237	Korea Institute for International Economic Policy	256
203.254.185.0/24	AS1237	Korea Labor Institute	256
203.254.186.0/24	AS1237	Korea Institute for Health and Social Affairs	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
203.254.123.24	AS45400 Korea Telecom	`7.27ms` 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
72.84.70.8	AS701 Verizon Business	`8.02ms` from Ashburn, US
181.235.216.152	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`8.06ms` from Bogota, CO
130.61.26.72	AS31898 Oracle Corporation	`0.31ms` from Frankfurt am Main, DE
124.160.124.216	AS4837 CHINA UNICOM China169 Backbone	`5.41ms` from Hangzhou, CN
60.246.225.88	AS4609 Companhia de Telecomunicacoes de Macau SARL	`2.22ms` from Hong Kong, HK
24.167.57.216	AS11427 Charter Communications Inc	`14.83ms` from Houston, US
24.162.165.248	AS11427 Charter Communications Inc	`11.29ms` from Houston, US
1.6.47.40	AS9583 Sify Limited	`1.02ms` from Indore, IN
140.255.2.72	AS4134 CHINANET-BACKBONE	`6.43ms` from Jinan, CN
18.169.105.152	AS16509 Amazon.com, Inc.	`0.53ms` from London, GB
90.221.232.216	AS5607 Sky UK Limited	`7.08ms` from London, GB
185.234.164.136	AS21056 Vianova S.p.A	`5.93ms` from Milan, IT
182.88.203.56	AS4837 CHINA UNICOM China169 Backbone	`6.89ms` from Nanning, CN
47.18.170.184	AS6128 Cablevision Systems Corp.	`2.82ms` from New York City, US
108.16.213.72	AS701 Verizon Business	`1.99ms` from Philadelphia, US
210.154.96.24	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.03ms` from Tokyo, JP
197.4.112.136	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`12.36ms` from Tunis, TN
98.144.188.24	AS10796 Charter Communications Inc	`7.44ms` from Chicago, US
175.166.80.248	AS4837 CHINA UNICOM China169 Backbone	`9.18ms` from Liaoyang, CN
98.171.190.40	AS22773 Cox Communications Inc.	`8.86ms` from Los Angeles, US
163.221.167.88	AS131158 Nara Institute of Science and Technology, National University Corporation	`1.86ms` from Osaka, JP
90.70.21.168	AS3215 Orange S.A.	`7.66ms` from Paris, FR
175.226.72.136	AS4766 Korea Telecom	`1.93ms` from Seoul, KR
211.209.245.184	AS9318 SK Broadband Co Ltd	`1.45ms` from Seoul, KR
83.250.193.168	AS1257 Tele2 Sverige AB	`5.62ms` from Stockholm, SE

Traceroute

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

traceroute -a -n -q1 203.254.123.24

traceroute to 203.254.123.24 (203.254.123.24): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.29 0.078 ms

2 [AS3786] 211.118.152.142 0.637 ms

3 *

4 [AS3786] 1.213.146.97 7.775 ms

5 [AS3786] 1.213.107.190 1.784 ms

6 [AS3786] 210.107.53.202 3.333 ms

7 *

8 *

9 *

10 [] 211.255.110.70 3.873 ms

11 [] 211.255.110.82 4.686 ms

12 [] 211.255.120.130 6.105 ms

13 *

14 [AS45400] 203.254.123.5 7.929 ms

15 [AS45400] 203.254.123.24 27.36 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On December 29th 2025

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