203.236.0.0/17

AS4766 · Korea Telecom

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Summary

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

WHOIS Details

inetnum:        203.236.64.0 - 203.236.127.255
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 are contained by 203.236.0.0/17

Range	ASN	Company	Num of IPs
203.236.40.0/22	AS9644	SK Telecom	1,024
203.236.32.0/21	AS9644	SK Telecom	2,048
203.236.0.0/19	AS9644	SK Telecom	8,192

Nearby Ranges

BGP prefixes that overlap with 203.236.0.0/16

Range	ASN	Company	Num of IPs
203.236.128.0/18	AS138195	SEJONG NETWORKS	16,384
203.236.128.0/18	AS23584	SEJONG NETWORKS	16,384
203.236.192.0/18	AS9286	KINX	16,384
203.236.128.0/18	AS9845	SEJONG NETWORKS	16,384
203.236.128.0/18	AS9848	SEJONG NETWORKS	16,384
203.236.128.0/18	AS9973	SEJONG NETWORKS	16,384
203.236.0.0/19	AS9644	SK Telecom	8,192
203.236.32.0/21	AS9644	SK Telecom	2,048
203.236.40.0/22	AS9644	SK Telecom	1,024

Hosted domains

There are 172 domain names hosted across 74 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.236.44.170	ilchilee.kr	16
203.236.111.26	xn--jb0bp16e.kr	7
203.236.86.175	buildcatalog.co.kr	6
203.236.50.91	vividbook.co	5
203.236.44.22	sr-dahnworld.com	4
203.236.44.34	healingmall.net	4
203.236.44.18	ilchi.es	4
203.236.44.172	dotongschool.com	3
203.236.44.93	xn--3e0bl59b6ik.org	3
203.236.44.73	healthleader.co.kr	2
203.236.86.15	intomark.com	2
203.236.44.173	ilchiacademy.co.kr	2
203.236.117.120	funnyflux.co.kr	2
203.236.86.45	wipson.com	2
203.236.111.14	dhflour.kr	2
203.236.44.91	khappybrain.org	2
203.236.86.50	wips.co.kr	1
203.236.50.51	haoie.net	1
203.236.44.46	brainworld.com	1
203.236.44.41	iwhopdca.com	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

6,320 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.236.54.66	AS4766 Korea Telecom	`1.56ms` from Seoul, KR
203.236.108.137	AS4766 Korea Telecom	`0.96ms` from Seoul, KR
203.236.46.1	AS4766 Korea Telecom	`1.96ms` from Seoul, KR
203.236.56.178	AS4766 Korea Telecom	`1.48ms` from Seoul, KR
203.236.55.147	AS4766 Korea Telecom	`1.47ms` from Seoul, KR
203.236.15.21	AS9644 SK Telecom	`2.33ms` from Seoul, KR
203.236.35.112	AS9644 SK Telecom	`2.31ms` from Seoul, KR
203.236.64.97	AS9696 Oscar Enterprise	`1.37ms` from Seoul, KR
203.236.62.219	AS4766 Korea Telecom	`1.44ms` from Seoul, KR
203.236.117.30	AS4766 Korea Telecom	`0.97ms` from Seoul, KR
203.236.99.246	AS4766 Korea Telecom	`2.21ms` from Seoul, KR
203.236.91.213	AS4766 Korea Telecom	`1.27ms` from Seoul, KR
203.236.14.22	AS9644 SK Telecom	`6.35ms` from Seoul, KR
203.236.121.253	AS4766 Korea Telecom	`1.66ms` from Seoul, KR
203.236.92.254	AS4766 Korea Telecom	`1.28ms` from Seoul, KR
203.236.60.51	AS4766 Korea Telecom	`1.44ms` from Seoul, KR
203.236.85.238	AS4766 Korea Telecom	`1.07ms` from Seoul, KR
203.236.113.154	AS4766 Korea Telecom	`1.11ms` from Seoul, KR
203.236.43.19	AS9644 SK Telecom	`1.41ms` from Seoul, KR
203.236.19.239	AS9644 SK Telecom	`2.70ms` from Seoul, KR
203.236.20.112	AS9644 SK Telecom	`2.48ms` from Seoul, KR
203.236.71.13	AS9696 Oscar Enterprise	`1.09ms` from Seoul, KR
203.236.87.126	AS4766 Korea Telecom	`1.07ms` from Seoul, KR
203.236.107.62	AS4766 Korea Telecom	`1.30ms` from Seoul, KR
203.236.126.254	AS4766 Korea Telecom	`1.24ms` 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
70.184.186.1	AS22773 Cox Communications Inc.	`5.66ms` from Ashburn, US
91.246.89.65	AS41798 JSC Transtelecom	`0.69ms` from Astana, KZ
67.147.16.1	AS19901 Brightspeed	`13.71ms` from Atlanta, US
68.71.186.1	AS4181 TDS TELECOM	`6.39ms` from Atlanta, US
124.120.126.1	AS17552 True Online	`2.22ms` from Bangkok, TH
49.48.8.1	AS45758 Triple T Broadband Public Company Limited	`3.83ms` from Bangkok, TH
211.143.106.1	AS24547 Hebei Mobile Communication Company Limited	`5.47ms` from Beijing, CN
122.139.84.1	AS4837 CHINA UNICOM China169 Backbone	`19.07ms` from Beijing, CN
91.108.65.177	AS133296 Web Werks India Pvt. Ltd.	`0.24ms` from Bengaluru, IN
190.84.216.1	AS10620 Telmex Colombia S.A.	`1.45ms` from Bogota, CO
181.142.192.1	AS13489 UNE EPM TELECOMUNICACIONES S.A.	`12.91ms` from Bogota, CO
179.176.99.17	AS18881 TELEFÔNICA BRASIL S.A	`14.38ms` from Brasilia, BR
213.118.43.97	AS6848 Telenet BV	`10.94ms` from Brussels, BE
181.209.110.81	AS52361 ARSAT - Empresa Argentina de Soluciones Satelitales S.A.	`2.79ms` from Buenos Aires, AR
181.169.155.1	AS7303 Telecom Argentina S.A.	`1.28ms` from Buenos Aires, AR
190.245.250.1	AS7303 Telecom Argentina S.A.	`1.95ms` from Buenos Aires, AR
23.17.5.1	AS852 TELUS Communications Inc.	`4.62ms` from Calgary, CA
61.187.179.129	AS4134 CHINANET-BACKBONE	`2.53ms` from Chenzhou, CN
98.52.220.1	AS7922 Comcast Cable Communications, LLC	`0.75ms` from Chicago, US
87.59.105.65	AS3292 TDC Holding A/S	`4.08ms` from Copenhagen, DK
3.67.73.113	AS16509 Amazon.com, Inc.	`0.19ms` from Frankfurt am Main, DE
89.76.150.1	AS9141 P4 Sp. z o.o.	`6.87ms` from Gdynia, PL
213.114.208.1	AS8434 Telenor Sverige AB	`1.06ms` from Goeteborg, SE
51.255.45.145	AS16276 OVH SAS	`0.15ms` from Gravelines, FR
122.231.125.193	AS4134 CHINANET-BACKBONE	`5.65ms` from Hangzhou, CN

Traceroute

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

traceroute -a -n -q1 203.236.112.190

traceroute to 203.236.112.190 (203.236.112.190): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.43 0.068 ms

2 [AS4766] 218.145.32.254 0.774 ms

3 *

4 *

5 [AS4766] 112.174.120.214 0.785 ms

6 *

7 *

8 [AS4766] 203.236.112.190 1.473 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On October 30th 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.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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