203.242.1.0/24

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 203.242.1.0/24

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

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

IP Address	ASN	Details
203.242.1.57	AS17841 NATIONAL INFORMATION RESOURCES SERVICE	`1.58ms` from Incheon, 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
204.195.168.248	AS11776 Breezeline	`14.29ms` from Ashburn, US
72.83.217.248	AS701 Verizon Business	`1.96ms` from Ashburn, US
35.162.255.168	AS16509 Amazon.com, Inc.	`0.22ms` from Boardman, US
113.108.240.104	AS4134 CHINANET-BACKBONE	`2.53ms` from Guangzhou, CN
43.139.215.8	AS45090 Shenzhen Tencent Computer Systems Company Limited	`2.23ms` from Guangzhou, CN
107.89.117.72	AS20057 AT&T Enterprises, LLC	`8.49ms` from Houston, US
94.78.252.216	AS12389 PJSC Rostelecom	`0.93ms` from Krasnoyarsk, RU
217.169.52.72	AS6908 Datahop - Six Degrees	`0.45ms` from London, GB
83.36.64.232	AS3352 TELEFONICA DE ESPANA S.A.U.	`1.74ms` from Madrid, ES
75.201.3.136	AS6167 Verizon Business	`11.15ms` from Miami, US
125.105.162.88	AS4134 CHINANET-BACKBONE	`9.74ms` from Ningbo, CN
34.233.76.152	AS14618 Amazon.com, Inc.	`0.16ms` from Reston, US
54.144.187.120	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
46.105.84.120	AS16276 OVH SAS	`0.07ms` from Roubaix, FR
156.246.184.184	AS44559 IT HOSTLINE LTD	`0.22ms` from Sao Paulo, BR
218.239.33.200	AS9318 SK Broadband Co Ltd	`7.17ms` from Seoul, KR
1.172.216.136	AS3462 Data Communication Business Group	`4.62ms` from Taichung, TW
126.15.244.120	AS17676 SoftBank Corp.	`3.32ms` from Tokyo, JP
152.203.250.200	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`4.06ms` from Bogota, CO
62.235.64.104	AS5432 Proximus NV	`2.14ms` from Brussels, BE
172.68.28.72	AS13335 Cloudflare, Inc.	`0.13ms` from Curitiba, BR
197.92.171.200	AS20011 Dimension Data	`1.72ms` from Durban, ZA
122.45.60.8	AS17858 LG POWERCOMM	`1.82ms` from Incheon, KR
161.230.77.72	AS12353 Vodafone Portugal	`7.46ms` from Lisbon, PT
151.63.142.104	AS1267 WIND TRE S.P.A.	`11.63ms` from Rome, IT

Traceroute

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

traceroute -a -n -q1 -f5 203.242.1.145

traceroute to 203.242.1.145 (203.242.1.145): 64 hops max, 52 byte packets

5 [AS8447] 195.3.64.165 6.452 ms

6 *

7 *

8 [] 80.81.193.16 17.829 ms

9 *

10 *

11 [AS3786] 1.208.107.218 224.774 ms

12 [AS3786] 211.40.2.250 260.407 ms

13 *

14 *

15 *

16 [AS17841] 152.99.71.66 272.441 ms

17 [AS17841] 203.242.1.145 265.962 ms

Measurement taken from

IPinfo ProbeNet in Ljubljana, SI

On January 19th 2026

What are IP address ranges?

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