Autonomous system
AS18305 POSNET-KR - POSCO DX
Unclassified RIPE
Summary
POSCO DX
business corporate korea steel
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, andPOSTEEL-NET-KRwhich 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-02, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 44 prefixes · 75.26K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| KR | Korea, Republic of | 44 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS18305- Registry name
- POSNET-KR
- Abuse contact
- hostmaster@nic.or.kr
- Registered
- 2002-07-05
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 69 with no ROA
- ROAs
- 22 authorising AS18305
- ASPA
- no ASPA record
- IRR
- 94% registered · 65 of 69 announcements
- Route objects
- 168 naming AS18305
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 448 networks and 1,851 prefixes, as published 2026-11-03. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere