AS18305

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Summary

IP address summary information
Name	POSCO DX
Country	South Korea
Website	host.io/poscoict.com·poscoict.com
Hosted domains	53
IPv4 addresses	74,752
IPv6 addresses	0
ASN type	Business
Registry	APNIC
Updated	3 years ago on Sep 5, 2023

Ranking

#26,439

Overall rank

among 74,680 networks

Traffic

#20,644

Infrastructure

#13,013

#207inSouth Korea

Learn how ASN rankings work

Geolocation

Share of IPv4 footprint per hexagonLessMore

Countries by IPv4 share

South Korea
100%

Held location over 90 days: 86%
Held location over 1 year: 96%
Median days between moves: 273 days
Geolocation scope: National

How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.

Activity

A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.

Mon

IP Ranges

Netblock	Company	Num of IPs
203.245.128.0/17	POSCO DX	32,768
203.241.0.0/19	POSCO DX	8,192
203.244.32.0/19	POSCO DX	8,192
203.244.64.0/19	POSCO DX	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
1.209.29.0/24	POSCO DX	256
1.209.181.0/24	POSCO DX	256
1.209.182.0/24	POSCO DX	256

IP Ranges

WHOIS


  ASHandle:       █████
  OrgID:          █████
  ASName:         ██████
  ASNumber:       AS█████
  RegDate:        ████-██-██
  Updated:        ████-██-██
  TechHandle:     ████-████
  Source:         ████

Hosted Domains

There are 53 domain names hosted across 34 IP addresses on this ASN.

IP Address	Domain	Count
1.209.183.128		8
203.238.219.7		3
203.231.146.80		3
116.123.216.77		2
203.245.200.32		2

Places

Peers

There are 5 peers for this ASN.

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

Upstreams

There are 5 upstreams for this ASN.

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

Downstreams

There are 0 downstreams for this ASN.

No downstreams found.

Pingable IPs

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

IP Address	ASN	Details
211.171.187.77 Ping	AS18305POSCO DX	4.02ms from Seoul, KR
118.129.142.60 Ping	AS18305POSCO DX	4.33ms from Incheon, KR
203.246.189.131 Ping	AS18305POSCO DX	3.73ms from Seoul, KR
203.238.206.129 Ping	AS18305POSCO DX	2.89ms from Seoul, KR
211.169.135.2 Ping	AS18305POSCO DX	4.43ms from Seoul, KR
119.202.117.211 Ping	AS18305POSCO DX	12.12ms from Seoul, KR
211.171.185.9 Ping	AS18305POSCO DX	3.41ms from Seoul, KR
211.171.186.18 Ping	AS18305POSCO DX	3.63ms from Seoul, KR
222.104.91.217 Ping	AS18305POSCO DX	6.34ms from Incheon, KR
1.209.185.230 Ping	AS18305POSCO DX	4.40ms from Seoul, KR

Other Pingable IPs

IP Address	ASN	Details

Pingable IPs

Important routers in AS18305


210.108.50.3	Seoul, South Korea
203.231.146.253	Sejong, South Korea
116.123.216.6	Seoul, South Korea
203.231.148.99	Sejong, South Korea
211.171.187.74	Incheon, South Korea
203.231.148.70	Sejong, South Korea
203.231.148.10	Sejong, South Korea
203.231.148.65	Sejong, South Korea
203.231.148.193	Sejong, South Korea

Important routers in AS18305

Traceroute

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

$ traceroute -a -n -q1 -f5 -m13 203.241.30.6

traceroute to 203.241.30.6 (203.241.30.6): 13 hops max, 52 byte packets

5 [AS21859] 128.1.9.240 0.812 ms

6 [AS21859] 128.1.108.108 0.797 ms

7 [AS4229] 98.98.231.208 0.757 ms

8 [] 162.128.6.100 23.175 ms

9 [] 162.128.7.51 25.163 ms

10 [] 103.16.102.221 25.291 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Bangkok, TH

On September 17, 2026

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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AS18305

Summary

Ranking

Geolocation

Countries by IPv4 share

Activity

IP Ranges

IP Ranges

WHOIS

Hosted Domains

Places

Peers

Upstreams

Downstreams

Pingable IPs

Other Pingable IPs

Pingable IPs

Important routers in AS18305

Important routers in AS18305

Traceroute

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What is an ASN?

An API built with users in mind: reliable, accurate, and easy-to-use

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Traceroute

Ranking

Important routers in AS18305

Geolocation

Countries by IPv4 share

Pingable IPs

Other Pingable IPs

Activity

IP Ranges

AS131804

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