203.243.15.0/24

AS23575  ·  SK Broadband Co Ltd

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Summary

Country South Korea
Domain kt.com
ASN AS23575
Registry APNIC
ID KORNET

WHOIS Details

inetnum:        203.243.12.0 - 203.243.15.255
netname:        KORNET
descr:          Korea Telecom
country:        KR
admin-c:        IM667-AP
tech-c:         IM667-AP
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2025-11-03T08:14:05Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        9, Jinheung-gil, Naju-si, Jeollanam-do
e-mail:         irt@nic.or.kr
abuse-mailbox:  irt@nic.or.kr
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        irt@nic.or.kr was validated on 2020-04-09
mnt-by:         MNT-KRNIC-AP
last-modified:  2025-09-04T01:00:01Z
source:         APNIC

person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IM667-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2017-03-28T06:37:04Z
source:         APNIC

inetnum:        203.243.12.0 - 203.243.15.255
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
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

Nearby Ranges

BGP prefixes that overlap with 203.243.0.0/16

Range ASN Company Num of IPs
203.243.128.0/17 AS136897 SEJONG NETWORKS 32,768
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 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

Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
125.120.29.216 AS4134 CHINANET-BACKBONE 6.87ms from Hangzhou, CN
190.134.43.88 AS6057 Administracion Nacional de Telecomunicaciones 1.77ms from Montevideo, UY
62.213.67.248 AS197695 Domain names registrar REG.RU, Ltd 1.02ms from Moscow, RU
45.161.31.8 AS268490 A.I.P. INTERNET 5.49ms from Osasco, BR
88.175.117.200 AS12322 Free SAS 13.78ms from Paris, FR
98.93.202.232 AS14618 Amazon.com, Inc. 0.41ms from Reston, US
92.100.64.104 AS12389 PJSC Rostelecom 1.58ms from Saint Petersburg, RU
65.65.254.56 AS7018 AT&T Enterprises, LLC 12.05ms from San Antonio, US
189.114.191.136 AS18881 TELEFÔNICA BRASIL S.A 1.80ms from Sao Paulo, BR
14.78.82.136 AS4766 Korea Telecom 7.59ms from Seoul, KR
14.84.69.248 AS4766 Korea Telecom 2.11ms from Seoul, KR
95.198.165.72 AS3301 Telia Company AB 8.08ms from Stockholm, SE
20.151.209.200 AS8075 Microsoft Corporation 0.17ms from Toronto, CA
38.68.91.8 AS398090 Lambda 0.25ms from Ashburn, US
219.89.120.232 AS4771 Spark New Zealand Trading Ltd. 0.99ms from Auckland, NZ
120.151.8.56 AS1221 Telstra Limited 6.12ms from Brisbane, AU
156.212.96.56 AS8452 TE-AS 6.82ms from Cairo, EG
51.89.168.232 AS16276 OVH SAS 0.08ms from Erith, GB
84.138.54.24 AS3320 Deutsche Telekom AG 5.79ms from Frankfurt am Main, DE
59.58.184.24 AS4134 CHINANET-BACKBONE 4.11ms from Fuzhou, CN
223.165.5.72 AS136258 BrainStorm Network, Inc 0.28ms from Islamabad, PK
178.204.78.200 AS28840 PJSC "TATTELECOM" 1.35ms from Kazan, RU
88.20.188.104 AS3352 TELEFONICA DE ESPANA S.A.U. 9.90ms from Madrid, ES
98.203.167.232 AS7922 Comcast Cable Communications, LLC 11.89ms from Seattle, US
34.64.251.56 AS396982 Google LLC 0.09ms 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 -f5 -m19 203.243.15.201
traceroute to 203.243.15.201 (203.243.15.201): 19 hops max, 52 byte packets
5 [AS3257] 67.199.141.33 0.421 ms
7 [AS3257] 213.254.227.14 245.262 ms
8 [AS4766] 112.174.87.77 253.228 ms
9 [AS4766] 112.174.91.49 247.109 ms
10 [AS4766] 112.174.94.98 259.157 ms
11 [AS4766] 203.234.255.234 254.927 ms
12 *
13 *
14 *
15 [AS23575] 125.61.60.1 255.324 ms
16 [AS23575] 125.61.12.114 256.151 ms
17 *
18 *
19 *
Measurement taken from IPinfo ProbeNet in Melbourne, AU
On

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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