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	AS4766	Korea Telecom	8,192
203.242.0.0/19	AS45400	Korea Telecom	8,192
203.242.0.0/19	AS17841	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
203.242.5.6	AS45400 Korea Telecom	`2.52ms` 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
54.237.211.152	AS14618 Amazon.com, Inc.	`0.82ms` from Ashburn, US
182.145.38.104	AS4134 CHINANET-BACKBONE	`7.46ms` from Chengdu, CN
68.179.133.184	AS12083 WideOpenWest Finance LLC	`12.84ms` from Chicago, US
170.130.193.56	AS62904 Eonix Corporation	`0.84ms` from Dallas, US
79.223.239.88	AS3320 Deutsche Telekom AG	`7.45ms` from Frankfurt am Main, DE
76.143.217.248	AS7922 Comcast Cable Communications, LLC	`8.47ms` from Houston, US
182.89.155.168	AS4837 CHINA UNICOM China169 Backbone	`7.32ms` from Nanning, CN
92.170.237.200	AS3215 Orange S.A.	`1.57ms` from Paris, FR
97.203.164.120	AS6167 Verizon Business	`12.55ms` from Philadelphia, US
175.193.213.88	AS4766 Korea Telecom	`1.15ms` from Seoul, KR
51.162.160.56	AS15830 Equinix (EMEA) Acquisition Enterprises B.V.	`1.05ms` from Tokyo, JP
169.56.24.200	AS36351 IBM Cloud	`0.57ms` from Tokyo, JP
198.252.86.8	AS36518 VSOFT Inc.	`5.49ms` from Toronto, CA
178.114.157.120	AS8437 Hutchison Drei Austria GmbH	`1.72ms` from Vienna, AT
81.245.215.8	AS5432 Proximus NV	`2.19ms` from Brussels, BE
65.27.28.184	AS10796 Charter Communications Inc	`12.06ms` from Columbus, US
3.135.222.24	AS16509 Amazon.com, Inc.	`0.70ms` from Columbus, US
141.118.20.40	AS852 TELUS Communications Inc.	`1.03ms` from Edmonton, CA
194.153.230.72	AS9009 M247 Europe SRL	`0.18ms` from Frankfurt am Main, DE
84.133.13.104	AS3320 Deutsche Telekom AG	`2.70ms` from Hamburg, DE
155.0.224.40	AS37532 Zambia Research and Education Network (ZAMREN)	`3.53ms` from Lusaka, ZM
79.236.114.120	AS3320 Deutsche Telekom AG	`6.09ms` from Nuernberg, DE
177.102.132.168	AS27699 TELEFÔNICA BRASIL S.A	`2.24ms` from Osasco, BR
179.135.143.232	AS26599 TELEFÔNICA BRASIL S.A	`1.95ms` from Sao Paulo, BR
23.60.186.120	AS16625 Akamai Technologies, Inc.	`0.89ms` from Seoul, KR

Traceroute

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

traceroute -a -n -q1 203.242.5.10

traceroute to 203.242.5.10 (203.242.5.10): 64 hops max, 52 byte packets

1 [AS15169] 142.251.49.8 141.626 ms

2 *

3 *

4 *

5 *

6 [AS9318] 222.233.213.230 268.126 ms

7 *

8 *

9 *

10 [] 211.255.110.6 246.704 ms

11 [] 211.255.110.18 279.891 ms

12 [] 211.255.120.2 269.893 ms

13 *

14 [AS45400] 203.242.5.249 270.807 ms

15 [AS45400] 203.242.5.10 275.152 ms

Measurement taken from

IPinfo ProbeNet in Paris, FR

On December 28th 2025

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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