203.243.0.0/18

AS4766 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS4766
Registry	KRNIC
ID	KORNET-KR

WHOIS Details

inetnum:        203.243.0.0 - 203.243.3.255
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:        [email protected] 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:         [email protected]
nic-hdl:        IM9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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:         [email protected]
nic-hdl:        IA9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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 are contained by 203.243.0.0/18

Range	ASN	Company	Num of IPs
203.243.39.0/24	AS4766	Korea Telecom	256

Nearby Ranges

BGP prefixes that overlap with 203.243.0.0/16

Range	ASN	Company	Num of IPs
203.243.128.0/17	AS141167	SEJONG NETWORKS	32,768
203.243.128.0/17	AS23584	SEJONG NETWORKS	32,768
203.243.128.0/17	AS9848	SEJONG NETWORKS	32,768
203.243.140.0/22	AS23584	HCN-Pusan	1,024
203.243.148.0/22	AS23584	HCN-Pusan	1,024
203.243.152.0/22	AS23584	HCN-Pusan	1,024
203.243.156.0/24	AS23584	HCN-Pusan	256
203.243.220.0/24	AS23584	HCN-Pusan	256
203.243.221.0/24	AS23584	HCN-Pusan	256
203.243.237.0/24	AS18300	Korea Electric Power Corporation	256
203.243.39.0/24	AS4766	Korea Telecom	256

Hosted domains

There are 4 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.243.46.108	lavishi.kr	1
203.243.51.47	npced16.shop	1
203.243.29.176	jjinnation.store	1

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

8,859 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.243.33.8	AS4766 Korea Telecom	`3.31ms` from Seoul, KR
203.243.25.129	AS4766 Korea Telecom	`1.66ms` from Seoul, KR
203.243.60.227	AS4766 Korea Telecom	`2.16ms` from Seoul, KR
203.243.55.136	AS4766 Korea Telecom	`2.58ms` from Seoul, KR
203.243.38.1	AS4766 Korea Telecom	`4.46ms` from Seoul, KR
203.243.20.18	AS4766 Korea Telecom	`1.66ms` from Seoul, KR
203.243.36.134	AS4766 Korea Telecom	`2.84ms` from Seoul, KR
203.243.0.253	AS4766 Korea Telecom	`1.80ms` from Seoul, KR
203.243.50.220	AS4766 Korea Telecom	`2.43ms` from Seoul, KR
203.243.8.188	AS4766 Korea Telecom	`1.36ms` from Seoul, KR
203.243.51.36	AS4766 Korea Telecom	`2.63ms` from Seoul, KR
203.243.57.212	AS4766 Korea Telecom	`4.21ms` from Seoul, KR
203.243.11.107	AS4766 Korea Telecom	`1.36ms` from Seoul, KR
203.243.14.253	AS4766 Korea Telecom	`1.15ms` from Seoul, KR
203.243.5.82	AS4766 Korea Telecom	`1.55ms` from Seoul, KR
203.243.6.33	AS4766 Korea Telecom	`1.40ms` from Seoul, KR
203.243.3.158	AS4766 Korea Telecom	`1.13ms` from Seoul, KR
203.243.43.1	AS4766 Korea Telecom	`3.94ms` from Seoul, KR
203.243.10.149	AS4766 Korea Telecom	`1.38ms` from Seoul, KR
203.243.53.164	AS4766 Korea Telecom	`2.72ms` from Seoul, KR
203.243.19.16	AS4766 Korea Telecom	`2.28ms` from Seoul, KR
203.243.44.243	AS4766 Korea Telecom	`4.54ms` from Seoul, KR
203.243.23.31	AS4766 Korea Telecom	`1.76ms` from Seoul, KR
203.243.45.1	AS4766 Korea Telecom	`4.89ms` from Seoul, KR
203.243.32.79	AS4766 Korea Telecom	`2.83ms` 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
20.4.131.114	AS8075 Microsoft Corporation	`0.22ms` from Amsterdam, NL
12.3.183.66	AS7018 AT&T Enterprises, LLC	`0.85ms` from Atlanta, US
12.33.237.162	AS7018 AT&T Enterprises, LLC	`8.08ms` from Chicago, US
87.158.225.34	AS3320 Deutsche Telekom AG	`1.87ms` from Frankfurt am Main, DE
14.244.71.130	AS45899 VNPT Corp	`2.91ms` from Hanoi, VN
123.203.151.82	AS9269 Hong Kong Broadband Network Ltd.	`0.76ms` from Hong Kong, HK
109.196.189.130	AS50362 LLC CABLE TELEVISION COMPANY CABLE TELEVISION NETWORKS PLUS	`8.49ms` from Kharkiv, UA
202.186.206.50	AS9930 TTNET-MY	`0.89ms` from Kuala Lumpur, MY
86.163.145.50	AS2856 British Telecommunications PLC	`4.44ms` from London, GB
149.248.7.210	AS20473 The Constant Company, LLC	`0.17ms` from Los Angeles, US
2.18.218.226	AS16625 Akamai Technologies, Inc.	`0.17ms` from Milan, IT
69.163.194.178	AS26347 New Dream Network, LLC	`0.27ms` from Portland, US
89.24.97.194	AS13036 T-Mobile Czech Republic a.s.	`0.67ms` from Prague, CZ
12.79.180.98	AS7018 AT&T Enterprises, LLC	`2.47ms` from San Jose, US
129.240.41.114	AS224 SIKT - KUNNSKAPSSEKTORENS TJENESTELEVERANDOR	`1.86ms` from Sandefjord, NO
1.94.87.242	AS55990 Huawei Cloud Service data center	`2.57ms` from Suzhou, CN
203.165.46.50	AS9824 JCOM Co., Ltd.	`12.51ms` from Tokyo, JP
173.32.135.34	AS812 Rogers Communications Canada Inc.	`1.39ms` from Toronto, CA
62.238.137.82	AS15435 DELTA Fiber Nederland B.V.	`6.02ms` from Amsterdam, NL
75.75.92.162	AS7922 Comcast Cable Communications, LLC	`9.49ms` from Ashburn, US
109.245.223.162	AS15958 CETINdoo-NET	`0.80ms` from Belgrade, RS
190.217.69.98	AS3549 Level 3 Parent, LLC	`0.58ms` from Bogota, CO
152.201.119.82	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`3.83ms` from Bogota, CO
102.100.80.2	AS36925 MEDITELECOM	`9.15ms` from Casablanca, MA
216.25.51.2	AS399356 Kosciusko Connect LLC	`3.40ms` from Chicago, US

Traceroute

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

traceroute -a -n -q1 -f4 -m9 203.243.17.157

traceroute to 203.243.17.157 (203.243.17.157): 9 hops max, 52 byte packets

4 [AS12389] 87.226.133.83 166.902 ms

5 [AS12389] 87.226.221.111 166.986 ms

6 [AS4766] 112.174.87.225 206.836 ms

7 *

8 *

9 *

Measurement taken from

IPinfo ProbeNet in Murmansk, RU

On December 20th 2025

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