203.242.0.0/24

AS17841 · NATIONAL INFORMATION RESOURCES SERVICE

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Summary

Country	South Korea
Domain	kt.com
ASN	AS17841
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:        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 203.242.0.0/24

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

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

IP Address	ASN	Details
203.242.0.161	AS17841 NATIONAL INFORMATION RESOURCES SERVICE	`1.53ms` 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
94.110.184.216	AS47377 Orange Belgium SA	`10.58ms` from Brussels, BE
164.68.96.136	AS51167 Contabo GmbH	`0.15ms` from Lauterbourg, FR
31.126.169.88	AS2856 British Telecommunications PLC	`5.39ms` from London, GB
35.246.78.200	AS396982 Google LLC	`0.09ms` from London, GB
141.179.102.72	AS25019 Saudi Telecom Company JSC	`3.94ms` from Manama, BH
83.106.112.168	AS5378 Vodafone Limited	`7.26ms` from Manchester, GB
151.59.32.152	AS1267 WIND TRE S.P.A.	`12.86ms` from Milan, IT
196.250.180.168	AS328136 Telecel Liberia Limited	`1.27ms` from Monrovia, LR
90.78.13.8	AS3215 Orange S.A.	`7.55ms` from Paris, FR
79.19.36.120	AS3269 Telecom Italia S.p.A.	`4.36ms` from Rome, IT
180.171.35.88	AS4812 China Telecom (Group)	`4.50ms` from Shanghai, CN
20.230.27.72	AS8075 Microsoft Corporation	`0.34ms` from Boydton, US
125.168.244.72	AS9443 Vocus Retail	`1.45ms` from Brisbane, AU
78.181.155.40	AS9121 Turk Telekomunikasyon Anonim Sirketi	`11.73ms` from Bursa, TR
97.150.94.168	AS6167 Verizon Business	`18.81ms` from Dallas, US
84.158.14.168	AS3320 Deutsche Telekom AG	`9.58ms` from Frankfurt am Main, DE
190.216.186.152	AS3549 Level 3 Parent, LLC	`0.51ms` from Lima, PE
172.166.173.168	AS8075 Microsoft Corporation	`0.25ms` from London, GB
132.219.155.8	AS376 Reseau d'Informations Scientifiques du Quebec (RISQ Inc.)	`5.10ms` from Montreal, CA
222.94.243.40	AS4134 CHINANET-BACKBONE	`1.25ms` from Nanjing, CN
72.187.38.72	AS33363 Charter Communications, Inc	`11.71ms` from Orlando, US
73.105.142.184	AS7922 Comcast Cable Communications, LLC	`7.70ms` from Orlando, US
112.69.173.120	AS17511 OPTAGE Inc.	`2.03ms` from Osaka, JP
193.248.191.72	AS3215 Orange S.A.	`1.95ms` from Paris, FR
107.22.237.8	AS14618 Amazon.com, Inc.	`0.24ms` from Reston, US

Traceroute

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

traceroute -a -n -q1 203.242.0.130

traceroute to 203.242.0.130 (203.242.0.130): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.44 0.075 ms

2 [AS3786] 211.118.152.142 0.773 ms

3 *

4 *

5 *

6 *

7 [AS3786] 1.213.112.30 1.868 ms

8 [AS3786] 1.213.112.110 1.913 ms

9 [AS3786] 210.107.53.198 1.899 ms

10 *

11 *

12 *

13 [AS17841] 152.99.71.66 2.035 ms

14 [AS17841] 203.242.0.130 1.999 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On January 19th 2026

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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