203.254.171.0/24

AS4766 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS4766
Registry	APNIC
ID	KORNET

WHOIS Details

inetnum:        203.254.171.0 - 203.254.171.255
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:  2025-11-03T08:14:07Z
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:        203.254.171.0 - 203.254.171.255
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 203.254.0.0/16

Range	ASN	Company	Num of IPs
203.254.192.0/18	AS6619	SamsungSDS Inc.	16,384
203.254.128.0/19	AS7560	Jeonbuk National University	8,192
203.254.176.0/20	AS1237	KISTI	4,096
203.254.160.0/21	AS10070	KRISS SubDAEJONnetworks connected to backbone	2,048
203.254.172.0/23	AS4766	Korea Telecom	512
203.254.168.0/23	AS1237	KISTI	512
203.254.40.0/24	AS1237	KISTI	256
203.254.240.0/24	AS138380	VOLVO CONSTRUCTION EQUIPMENT KOREA LTD	256
203.254.170.0/24	AS17861	KISTI	256
203.254.9.0/24	AS3786	Korea Internet Security Agency	256
203.254.241.0/24	AS6619	SamsungSDS Inc.	256
203.254.51.0/24	AS9494	National Infomation Society Agency	256
203.254.179.0/24	AS1237	National Research Council for	256
203.254.180.0/24	AS1237	Science and Technology Policy Institute	256
203.254.181.0/24	AS1237	Korea Institute for International Economic Policy	256
203.254.185.0/24	AS1237	Korea Labor Institute	256
203.254.186.0/24	AS1237	Korea Institute for Health and Social Affairs	256

Hosted domains

There are 2 domain names hosted across 2 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.254.171.111	kaiv.or.kr	1
203.254.171.88	hanwha-ess.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

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

IP Address	ASN	Details
203.254.171.121	AS4766 Korea Telecom	`1.70ms` 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
54.212.201.40	AS16509 Amazon.com, Inc.	`0.18ms` from Boardman, US
71.174.114.8	AS701 Verizon Business	`1.93ms` from Boston, US
52.161.149.120	AS8075 Microsoft Corporation	`3.42ms` from Denver, US
3.77.183.24	AS16509 Amazon.com, Inc.	`0.12ms` from Frankfurt am Main, DE
86.137.22.152	AS2856 British Telecommunications PLC	`4.50ms` from London, GB
105.168.222.232	AS37119 UNITEL SA	`0.81ms` from Luanda, AO
81.43.204.24	AS3352 TELEFONICA DE ESPANA S.A.U.	`2.18ms` from Madrid, ES
167.62.103.120	AS6057 Administracion Nacional de Telecomunicaciones	`1.75ms` from Montevideo, UY
39.78.45.40	AS4837 CHINA UNICOM China169 Backbone	`6.02ms` from Qingdao, CN
18.140.116.168	AS16509 Amazon.com, Inc.	`0.44ms` from Singapore, SG
133.186.60.8	AS63782 Omaezaki Cable Television Co.Ltd	`5.05ms` from Tokyo, JP
78.1.64.24	AS5391 Hrvatski Telekom d.d.	`1.76ms` from Zagreb, HR
141.70.116.120	AS553 BelWue-Koordination	`4.79ms` from Frankfurt am Main, DE
92.37.23.200	AS21283 A1 Slovenija telekomunikacijske storitve,d.d.	`1.44ms` from Ljubljana, SI
66.209.84.8	AS23005 SWITCH, LTD	`5.21ms` from Los Angeles, US
84.70.121.152	AS5378 Vodafone Limited	`3.29ms` from Manchester, GB
15.157.146.24	AS16509 Amazon.com, Inc.	`0.17ms` from Montreal, CA
100.18.13.216	AS701 Verizon Business	`4.52ms` from Philadelphia, US
54.221.45.152	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US
47.254.37.24	AS45102 Alibaba (US) Technology Co., Ltd.	`0.45ms` from Santa Clara, US
191.252.122.232	AS27715 Locaweb Serviços de Internet S/A	`0.98ms` from Sao Paulo, BR
220.233.224.40	AS10143 Exetel Pty Ltd	`0.48ms` from Sydney, AU
118.79.140.120	AS4837 CHINA UNICOM China169 Backbone	`3.81ms` from Taiyuan, CN
180.11.214.232	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.01ms` from Tokyo, JP
178.148.238.88	AS31042 Serbia BroadBand-Srpske Kablovske mreze d.o.o.	`3.87ms` from Belgrade, RS

Traceroute

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

traceroute -a -n -q1 -f5 203.254.171.121

traceroute to 203.254.171.121 (203.254.171.121): 64 hops max, 52 byte packets

5 [AS4766] 112.174.87.77 202.374 ms

6 [AS4766] 112.174.86.109 203.46 ms

7 *

8 *

9 *

10 [AS4766] 203.254.171.121 206.473 ms

Measurement taken from

IPinfo ProbeNet in Luxembourg, LU

On February 7th 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.

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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