203.242.5.0/24

AS45400 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS45400
Parent Range	203.242.0.0/19
Registry	KRNIC
ID	KORNET-KR

WHOIS Details

inetnum:        203.242.0.0 - 203.242.31.255
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
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

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

Overlapping Ranges

BGP prefixes that contain 203.242.5.0/24

Range	ASN	Company	Num of IPs
203.242.0.0/19	AS17841	Korea Telecom	8,192
203.242.0.0/19	AS4766	Korea Telecom	8,192
203.242.0.0/19	AS45400	Korea Telecom	8,192

Nearby Ranges

BGP prefixes that overlap with 203.242.0.0/16

Range	ASN	Company	Num of IPs
203.242.0.0/19	AS4766	Korea Telecom	8,192
203.242.0.0/19	AS17841	Korea Telecom	8,192
203.242.0.0/19	AS45400	Korea Telecom	8,192
203.242.32.0/20	AS10189	Hyundai Movex	4,096
203.242.80.0/20	AS10049	SK Co.,	4,096
203.242.48.0/21	AS10189	Hyundai Movex	2,048
203.242.56.0/22	AS10189	Hyundai Movex	1,024
203.242.60.0/23	AS10189	Hyundai Movex	512
203.242.207.0/24	AS7557	KTNETDRDAEJEONBACKBONE	256
203.242.62.0/24	AS10189	Hyundai Movex	256
203.242.202.0/24	AS7557	KTNETDRSERVICENETWORK	256

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

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

IP Address	ASN	Details
203.242.5.10	AS45400 Korea Telecom	`2.45ms` 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
35.162.181.136	AS16509 Amazon.com, Inc.	`0.15ms` from Boardman, US
88.67.38.216	AS3209 Vodafone GmbH	`7.57ms` from Frankfurt am Main, DE
20.240.128.136	AS8075 Microsoft Corporation	`0.15ms` from Gaevle, SE
74.15.112.168	AS577 Bell Canada	`2.44ms` from Montreal, CA
56.124.59.200	AS16509 Amazon.com, Inc.	`0.90ms` from Osasco, BR
72.45.28.24	AS11776 Breezeline	`9.14ms` from Philadelphia, US
42.96.200.136	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.38ms` from Qingdao, CN
106.250.222.136	AS3786 LG DACOM Corporation	`2.13ms` from Seoul, KR
182.168.166.8	AS2527 Sony Network Communications Inc.	`6.94ms` from Tokyo, JP
209.71.57.72	AS20259 Copper Valley Long Distance, LLC	`6.40ms` from Anchorage, US
91.55.213.200	AS3320 Deutsche Telekom AG	`5.89ms` from Berlin, DE
54.191.112.152	AS16509 Amazon.com, Inc.	`0.18ms` from Boardman, US
41.237.226.120	AS8452 TE-AS	`4.15ms` from Cairo, EG
173.187.243.56	AS7029 Windstream Communications LLC	`13.19ms` from Chicago, US
131.228.32.168	AS200656 Nokia Solutions and Networks Oy	`0.53ms` from Frankfurt am Main, DE
49.79.175.136	AS131325 CHINATELECOM JIANGSU province NANTONG MAN network	`6.71ms` from Huai'an, CN
39.115.69.136	AS9318 SK Broadband Co Ltd	`1.01ms` from Incheon, KR
83.105.178.88	AS5378 Vodafone Limited	`5.68ms` from London, GB
97.134.15.248	AS6167 Verizon Business	`7.82ms` from Los Angeles, US
187.250.48.184	AS8151 UNINET	`3.76ms` from Los Angeles, US
108.189.118.24	AS33363 Charter Communications, Inc	`10.11ms` from Orlando, US
210.97.91.216	AS4766 Korea Telecom	`4.35ms` from Seoul, KR
3.27.252.232	AS16509 Amazon.com, Inc.	`0.57ms` from Sydney, AU
220.240.233.56	AS7545 TPG Telecom Limited	`1.19ms` from Sydney, AU
201.92.219.72	AS27699 TELEFÔNICA BRASIL S.A	`1.97ms` from São Paulo, BR

Traceroute

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

traceroute -a -n -q1 203.242.5.9

traceroute to 203.242.5.9 (203.242.5.9): 64 hops max, 52 byte packets

1 [AS199524] 92.223.73.3 0.332 ms

2 *

3 *

4 [AS9286] 121.78.68.49 0.146 ms

5 [AS9957] 203.246.169.173 0.634 ms

6 [] 139.150.100.125 1.418 ms

7 *

8 *

9 *

10 [] 211.255.110.2 2.229 ms

11 [] 211.255.110.10 1.811 ms

12 [] 211.255.120.2 4.26 ms

13 *

14 [AS45400] 203.242.5.9 2.835 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On January 19th 2026

What are IP address ranges?

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