AS18305 POSCO DX details

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AS18305 – POSCO DX

Field	Value
Country	South Korea
Website	poscoict.com
Hosted domains	70
Number of IPv4	74,240
Number of IPv6	0
ASN type	Business
Registry	apnic
Updated	2 years ago on Sep 05, 2023

IP Ranges

IPv4 Ranges
IPv6 Ranges

Netblock	Company	Num of IPs
203.245.128.0/17	POSCO Engineering Construction Co.,Ltd	32,768
203.241.0.0/19	POSCO DX	8,192
203.244.32.0/19	POSCO DAEWOO	8,192
203.244.64.0/19	POSCO DAEWOO	8,192
203.238.192.0/21	POSCO DX	2,048
203.238.200.0/22	POSCO DX	1,024
203.238.220.0/22	POSCO DX	1,024
116.123.216.0/24	SK Broadband Co Ltd	256
116.124.169.0/24	SK Broadband Co Ltd	256
116.127.24.0/24	SK Broadband Co Ltd	256
118.129.142.0/24	LG DACOM Corporation	256
118.129.143.0/24	LG DACOM Corporation	256
119.202.117.0/24	Korea Telecom	256
1.209.183.0/24	LG DACOM Corporation	256
1.209.185.0/24	LG DACOM Corporation	256
1.209.29.0/24	LG DACOM Corporation	256
175.202.208.0/24	Korea Telecom	256
175.202.211.0/24	Korea Telecom	256
175.202.213.0/24	Korea Telecom	256
203.231.144.0/24	SEJONG NETWORKS	256
203.231.146.0/24	SEJONG NETWORKS	256
203.231.147.0/24	SEJONG NETWORKS	256
203.231.148.0/24	SEJONG NETWORKS	256
203.231.149.0/24	SEJONG NETWORKS	256
203.231.151.0/24	SEJONG NETWORKS	256
203.238.204.0/24	POSCO DX	256
203.238.205.0/24	POSCO DX	256
203.238.206.0/24	POSCO DX	256
203.238.207.0/24	POSCO DX	256
203.238.210.0/24	POSCO DX	256
203.238.219.0/24	POSCO DX	256
203.238.221.0/24	POSCO DX	256
203.246.184.0/24	POSCO DX	256
203.246.185.0/24	POSCO DX	256
203.246.186.0/24	POSCO DX	256
203.246.187.0/24	POSCO DX	256
203.246.188.0/24	POSCO DX	256
203.246.189.0/24	POSCO DX	256
210.105.154.0/24	Korea Telecom	256
210.108.199.0/24	LG DACOM Corporation	256
210.108.50.0/24	LG DACOM Corporation	256
210.109.175.0/24	SEJONG NETWORKS	256
210.113.156.0/24	Korea Telecom	256
210.113.157.0/24	Korea Telecom	256
211.169.135.0/24	DACOM Corp.	256
211.171.182.0/24	DACOM Corp.	256
211.171.185.0/24	DACOM Corp.	256
211.171.186.0/24	DACOM Corp.	256
211.171.187.0/24	DACOM Corp.	256
211.171.31.0/24	DACOM Corp.	256
211.229.145.0/24	Korea Telecom	256
211.32.161.0/24	LG DACOM Corporation	256
211.32.162.0/24	LG DACOM Corporation	256
211.32.165.0/24	LG DACOM Corporation	256
211.60.10.0/24	LG DACOM Corporation	256
222.104.91.0/24	Korea Telecom	256
222.104.92.0/24	Korea Telecom	256
39.121.111.0/24	SK Broadband Co Ltd	256

There are no known IPv6 addresses belonging to this network

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WHOIS Details

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                                                ASHandle:       AS18305
                                                OrgID:          AS18305
                                                ASName:         AS18305
                                                ASNumber:       AS18305
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 70 domain names hosted across 37 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
1.209.183.128	██████████	10
1.209.29.67	██████████	6
203.231.146.3	█████████	4
1.209.185.136	██████████	4
211.32.165.52	██████████	4
203.238.219.7	██████████	3
211.171.185.202	██████████	3
203.245.200.32	██████████	2
116.123.216.77	██████████	2
210.108.50.104	██████████	2

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Peers

There are 5 peers for this ASN.

Peers	Name
AS13335	Cloudflare, Inc.
AS3786	LG DACOM Corporation
AS4766	Korea Telecom
AS9318	SK Broadband Co Ltd
AS9848	SEJONG NETWORKS

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ASN API

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Upstreams

There are 5 upstreams for this ASN.

upstreams	Name
AS13335	Cloudflare, Inc.
AS3786	LG DACOM Corporation
AS4766	Korea Telecom
AS9318	SK Broadband Co Ltd
AS9848	SEJONG NETWORKS

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ASN API

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Downstreams

There are no downstreams for this ASN.

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Pingable IPs

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

IP Address	ASN	Details
203.244.54.99	AS18305 POSCO DX	`0.11ms` from Istanbul, TR
203.245.222.153	AS18305 POSCO DX	`3.46ms` from Seoul, KR
203.245.211.163	AS18305 POSCO DX	`3.39ms` from Seoul, KR
203.244.37.2	AS18305 POSCO DX	`3.12ms` from Seoul, KR
203.245.206.161	AS18305 POSCO DX	`3.58ms` from Seoul, KR
203.245.216.138	AS18305 POSCO DX	`3.54ms` from Seoul, KR
203.244.87.101	AS18305 POSCO DX	`2.93ms` from Seoul, KR
203.244.95.44	AS18305 POSCO DX	`3.27ms` from Seoul, KR
203.238.210.181	AS18305 POSCO DX	`8.43ms` from Seoul, KR
203.244.48.49	AS18305 POSCO DX	`2.92ms` from Seoul, KR
119.202.117.205	AS18305 POSCO DX	`12.32ms` from Seoul, KR
203.244.51.217	AS18305 POSCO DX	`3.12ms` from Seoul, KR
203.245.235.34	AS18305 POSCO DX	`3.52ms` from Seoul, KR
203.244.55.61	AS18305 POSCO DX	`3.02ms` from Seoul, KR
203.245.219.156	AS18305 POSCO DX	`3.52ms` from Seoul, KR
203.244.88.146	AS18305 POSCO DX	`3.04ms` from Seoul, KR
203.244.83.17	AS18305 POSCO DX	`3.08ms` from Seoul, KR
203.245.173.102	AS18305 POSCO DX	`3.63ms` from Seoul, KR
203.244.40.237	AS18305 POSCO DX	`0.12ms` from Istanbul, TR
211.32.165.235	AS18305 POSCO DX	`3.23ms` from Seoul, KR
203.246.186.30	AS18305 POSCO DX	`3.57ms` from Seoul, KR
203.245.163.169	AS18305 POSCO DX	`3.36ms` from Seoul, KR
203.244.63.145	AS18305 POSCO DX	`3.17ms` from Seoul, KR
203.238.207.2	AS18305 POSCO DX	`3.53ms` from Seoul, KR
175.202.213.1	AS18305 POSCO DX	`3.06ms` 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
81.172.162.145	AS15435 DELTA Fiber Nederland B.V.	`1.75ms` from Amsterdam, NL
83.86.130.1	AS33915 Vodafone Libertel B.V.	`3.75ms` from Amsterdam, NL
217.123.84.1	AS33915 Vodafone Libertel B.V.	`1.32ms` from Amsterdam, NL
94.107.108.1	AS47377 Orange Belgium SA	`6.98ms` from Amsterdam, NL
128.172.9.161	AS16643 Virginia Commonwealth University	`4.33ms` from Ashburn, US
129.80.174.17	AS31898 Oracle Corporation	`0.40ms` from Ashburn, US
172.220.192.81	AS20115 Charter Communications LLC	`15.52ms` from Atlanta, US
216.122.251.1	AS22408 West Ky Networks	`11.99ms` from Atlanta, US
68.42.59.1	AS7922 Comcast Cable Communications, LLC	`9.28ms` from Atlanta, US
171.103.211.145	AS7470 TRUE INTERNET Co.,Ltd.	`2.00ms` from Bangkok, TH
190.84.165.1	AS10620 Telmex Colombia S.A.	`1.80ms` from Bogota, CO
45.68.27.225	AS272806 PIT COLOMBIA SAS	`0.99ms` from Bogota, CO
211.26.7.1	AS9443 Vocus Retail	`2.75ms` from Brisbane, AU
190.183.16.81	AS20207 Gigared S.A.	`9.32ms` from Buenos Aires, AR
200.114.250.1	AS7303 Telecom Argentina S.A.	`1.01ms` from Buenos Aires, AR
66.194.31.129	AS3549 Level 3 Parent, LLC	`0.57ms` from Charlotte, US
73.210.152.65	AS7922 Comcast Cable Communications, LLC	`5.37ms` from Chicago, US
91.100.70.129	AS15516 DKTV A/S	`0.37ms` from Copenhagen, DK
80.196.140.129	AS3292 TDC Holding A/S	`3.61ms` from Copenhagen, DK
115.168.71.241	AS4134 CHINANET-BACKBONE	`13.47ms` from Dalian, CN
131.186.52.1	AS54253 Oracle Corporation	`1.39ms` from Dhaka, BD
91.72.51.1	AS15802 Emirates Integrated Telecommunications Company PJSC	`2.56ms` from Dubai, AE
46.7.186.1	AS6830 Liberty Global B.V.	`0.83ms` from Dublin, IE
165.166.73.1	AS2711 Spirit Communications	`7.47ms` from Durham, US
82.115.117.1	AS12360 KEVAG Telekom GmbH	`2.55ms` from Frankfurt am Main, DE

Traceroute

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

traceroute -a -n -q1 -f2 -m7 203.241.6.64

traceroute to 203.241.6.64 (203.241.6.64): 7 hops max, 52 byte packets

2 [AS29049] 94.20.241.9 19.379 ms

3 *

4 [] 80.81.197.58 225.928 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Baku, AZ

On August 28th 2025

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS18305 at robtex.

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