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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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
203.244.66.112	AS18305 POSCO DX	`0.11ms` from Istanbul, TR
203.244.47.122	AS18305 POSCO DX	`0.11ms` from Istanbul, TR
203.244.37.2	AS18305 POSCO DX	`3.12ms` from Seoul, KR
203.245.209.148	AS18305 POSCO DX	`3.44ms` from Seoul, KR
203.245.176.224	AS18305 POSCO DX	`3.66ms` from Seoul, KR
203.231.151.31	AS18305 POSCO DX	`3.44ms` from Seoul, KR
210.109.175.11	AS18305 POSCO DX	`4.31ms` from Seoul, KR
203.244.69.221	AS18305 POSCO DX	`2.96ms` from Seoul, KR
203.245.225.177	AS18305 POSCO DX	`3.41ms` from Seoul, KR
203.246.184.49	AS18305 POSCO DX	`3.67ms` from Seoul, KR
211.32.161.144	AS18305 POSCO DX	`3.55ms` from Seoul, KR
203.245.163.169	AS18305 POSCO DX	`3.36ms` from Seoul, KR
222.104.92.64	AS18305 POSCO DX	`16.70ms` from Seoul, KR
116.127.24.95	AS18305 POSCO DX	`3.56ms` from Seoul, KR
203.245.172.40	AS18305 POSCO DX	`3.63ms` from Seoul, KR
211.229.145.42	AS18305 POSCO DX	`8.41ms` from Seoul, KR
203.246.189.131	AS18305 POSCO DX	`3.75ms` from Seoul, KR
203.245.202.11	AS18305 POSCO DX	`3.62ms` from Seoul, KR
203.245.149.249	AS18305 POSCO DX	`3.60ms` from Seoul, KR
203.245.200.141	AS18305 POSCO DX	`3.64ms` from Seoul, KR
203.244.90.14	AS18305 POSCO DX	`3.17ms` from Seoul, KR
203.244.41.226	AS18305 POSCO DX	`3.16ms` from Seoul, KR
203.245.148.147	AS18305 POSCO DX	`3.64ms` from Seoul, KR
203.245.133.178	AS18305 POSCO DX	`3.46ms` from Seoul, KR
203.244.73.102	AS18305 POSCO DX	`2.86ms` 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
154.244.102.145	AS36947 Telecom Algeria	`10.92ms` from Algiers, DZ
89.98.92.1	AS33915 Vodafone Libertel B.V.	`3.97ms` from Amsterdam, NL
149.72.252.17	AS11377 SendGrid, Inc.	`0.38ms` from Ashburn, US
72.28.249.1	AS11776 Breezeline	`6.35ms` from Ashburn, US
98.191.210.1	AS22773 Cox Communications Inc.	`0.99ms` from Ashburn, US
172.220.192.81	AS20115 Charter Communications LLC	`15.52ms` from Atlanta, US
156.62.231.241	AS24398 Auckland University of Technology	`1.16ms` from Auckland, NZ
114.109.126.1	AS17552 True Online	`5.29ms` from Bangkok, TH
218.68.34.65	AS4837 CHINA UNICOM China169 Backbone	`6.11ms` from Beijing, CN
204.111.124.1	AS4922 Shenandoah Cable Television LLC	`7.17ms` from Berkeley Springs, US
195.85.2.113	AS212583 FOCUSNET GMBH	`1.06ms` from Berlin, DE
75.212.130.193	AS6167 Verizon Business	`11.10ms` from Chicago, US
116.168.200.1	AS4837 CHINA UNICOM China169 Backbone	`2.03ms` from Chongqing, CN
24.112.98.1	AS35986 Vyve Broadband	`7.24ms` from Dallas, US
12.57.180.81	AS7018 AT&T Enterprises, LLC	`4.23ms` from Dallas, US
88.246.240.1	AS9121 Turk Telekomunikasyon Anonim Sirketi	`7.66ms` from Denizli, TR
78.100.163.129	AS8781 Ooredoo Q.S.C.	`0.94ms` from Doha, QA
34.252.148.1	AS16509 Amazon.com, Inc.	`0.13ms` from Dublin, IE
200.212.5.193	AS4230 CLARO S.A.	`18.28ms` from Fortaleza, BR
80.68.96.1	AS2119 Telenor Norge AS	`2.88ms` from Goeteborg, SE
61.140.246.113	AS4134 CHINANET-BACKBONE	`1.89ms` from Guangzhou, CN
113.116.120.1	AS4134 CHINANET-BACKBONE	`5.82ms` from Guangzhou, CN
111.120.168.1	AS4134 CHINANET-BACKBONE	`4.96ms` from Guiyang, CN
98.150.159.33	AS20001 Charter Communications Inc	`9.69ms` from Honolulu, US
123.231.202.209	AS4800 PT Aplikanusa Lintasarta	`1.10ms` from Jakarta, ID

Traceroute

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

traceroute -a -n -q1 -f2 -m6 203.245.196.214

traceroute to 203.245.196.214 (203.245.196.214): 6 hops max, 52 byte packets

2 [AS15566] 62.77.129.6 0.258 ms

3 [] 193.188.137.175 0.765 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Budapest, HU

On August 23rd 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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