AS18305 — POSNET POSCO DX
AS18305 announces 43 IPv4 prefixes covering 75,264 addresses and 0 IPv6 prefixes.
About this network
The AS handle POSNET is held by POSCO DX, the digital technology subsidiary of the POSCO Group.
What it's used for
- The address space carries internal corporate infrastructure, evidenced by netnames such as POSEC-NET-KR, POSCOICT-NET-KR, and POSTEEL-NET-KR which correspond to POSCO's security, ICT, and steel production divisions.
- With 75,264 IPv4 addresses announced across 44 prefixes and only 5 observed neighbours, the high address-to-neighbour ratio indicates a large internal corporate estate rather than a transit or access network.
Notable
- All registrants are listed as IRT-KRNIC-KR, which is the generic Korea Network Information Center handle, while the netnames clearly identify specific POSCO Group entities.
- The inventory is finely subdivided into multiple /19, /20, and /23 blocks, reflecting site-by-site or departmental segmentation within the corporate network.
- No IPv6 prefixes are announced in the inventory.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 1.209.29.0/24
- 1.209.181.0/24
- 1.209.182.0/23
- 1.209.185.0/24
- 39.121.111.0/24
- 116.123.216.0/24
- 116.124.169.0/24
- 116.127.24.0/24
- 118.129.142.0/23
- 119.202.117.0/24
- 175.202.208.0/24
- 175.202.211.0/24
- 175.202.212.0/23
- 203.231.144.0/22
- 203.231.148.0/23
- 203.231.151.0/24
- 203.238.192.0/20
- 203.238.210.0/24
- 203.238.219.0/24
- 203.238.220.0/22
- 203.241.0.0/19
- 203.244.32.0/19
- 203.244.64.0/19
- 203.245.128.0/17
- 203.246.184.0/22
- 203.246.188.0/23
- 210.105.154.0/24
- 210.108.50.0/24
- 210.108.199.0/24
- 210.109.175.0/24
- 210.113.156.0/23
- 211.32.161.0/24
- 211.32.162.0/24
- 211.32.165.0/24
- 211.60.10.0/24
- 211.169.135.0/24
- 211.171.31.0/24
- 211.171.182.0/24
- 211.171.185.0/24
- 211.171.186.0/23
- 211.229.145.0/24
- 222.104.91.0/24
- 222.104.92.0/24
Upstream networks
- AS4766 Korea Telecom
- AS9318 SK Broadband Co Ltd
- AS9848 SEJONG NETWORKS
- AS13335 Cloudflare, Inc.
- AS3786 LG DACOM Corporation
Adjacent networks
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Search Results
IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED