1. All IP Ranges
  2. 203.0.0.0/8
  3. 203.254.0.0/16
  4. AS17841  | 203.254.121.0/24

203.254.121.0/24

AS17841  ·  NATIONAL INFORMATION RESOURCES SERVICE

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Summary

Country South Korea
Domain kt.com
ASN AS17841
Registry APNIC
ID KORNET-KR

WHOIS Details

inetnum:        203.254.120.0 - 203.254.127.255
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:  2025-11-03T08:14:06Z
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:        203.254.120.0 - 203.254.127.255
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
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
203.254.171.0/24 AS4766 Korea Telecom 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 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

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
108.67.45.232 AS7018 AT&T Enterprises, LLC 2.37ms from Atlanta, US
138.207.196.56 AS11776 Breezeline 9.19ms from Boston, US
156.214.45.72 AS8452 TE-AS 5.93ms from Cairo, EG
119.53.155.200 AS4837 CHINA UNICOM China169 Backbone 1.54ms from Changchun, CN
117.233.186.216 AS9829 National Internet Backbone 6.21ms from Kolkata, IN
52.201.54.200 AS14618 Amazon.com, Inc. 0.16ms from Reston, US
54.86.24.88 AS14618 Amazon.com, Inc. 0.23ms from Reston, US
52.0.26.104 AS14618 Amazon.com, Inc. 0.22ms from Reston, US
111.217.155.24 AS2527 Sony Network Communications Inc. 1.46ms from Tokyo, JP
197.60.149.136 AS8452 TE-AS 14.91ms from Cairo, EG
66.82.124.40 AS63062 Hughes Network Systems, LLC 15.17ms from Chicago, US
69.238.103.152 AS7018 AT&T Enterprises, LLC 1.77ms from Los Angeles, US
88.21.41.232 AS3352 TELEFONICA DE ESPANA S.A.U. 9.86ms from Madrid, ES
163.69.92.248 AS36351 IBM Cloud 1.10ms from Osaka, JP
87.214.232.104 AS13127 Odido Netherlands B.V. 5.84ms from Amsterdam, NL
20.86.123.88 AS8075 Microsoft Corporation 0.23ms from Amsterdam, NL
79.199.196.88 AS3320 Deutsche Telekom AG 2.87ms from Frankfurt am Main, DE
111.231.242.248 AS45090 Shenzhen Tencent Computer Systems Company Limited 2.02ms from Guangzhou, CN
121.55.173.88 AS9781 GREEN CABLE TELEVISION STATION 5.64ms from Incheon, KR
181.132.215.104 AS13489 UNE EPM TELECOMUNICACIONES S.A. 8.36ms from Medellin, CO
49.188.186.24 AS4804 Microplex PTY LTD 7.37ms from Melbourne, AU
13.107.22.200 AS8068 Microsoft Corporation 0.32ms from Melbourne, AU
71.206.75.40 AS7922 Comcast Cable Communications, LLC 5.42ms from Miami, US
36.156.189.216 AS56046 China Mobile communications corporation 2.62ms from Nanjing, CN
112.77.107.136 AS9316 DACOM-PUBNETPLUS 1.28ms 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 -m5 203.254.121.214
traceroute to 203.254.121.214 (203.254.121.214): 5 hops max, 52 byte packets
3 *
4 *
5 *
Measurement taken from IPinfo ProbeNet in Abu Dhabi, AE
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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