Autonomous system
AS3743 ARCEL-2
Unclassified ARIN
Summary
Cleveland-Cliffs Steel
enterprise legacy
The network of Cleveland-Cliffs Steel LLC (ARCEL-2), the US steelmaker, with its registry record listed in Chicago, Illinois.
What it's used for
- Corporate and industrial networking — offices, mills, and the systems that run them.
Notable
- Enterprise address space: it serves a manufacturer's own operations, not customers or subscribers.
- Announces a small footprint, on the order of a couple of thousand IPv4 addresses.
Interesting
- The
ARCELhandle is a leftover from ArcelorMittal USA, whose US steel business Cleveland-Cliffs acquired in 2020 — the AS number moved with the assets while the registry handle stayed put, a common way a handle ends up naming a company that no longer holds it.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS209 | CenturyLink Communications, LLC | 427 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 6 prefixes · 1.79K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 6 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS3743- Registry name
- ARCEL-2
- Registrant
- Cleveland Cliffs Steel LLC
- Abuse contact
- arinadmin@clevelandcliffs.com
- Registered
- 2009-09-09
- Last changed
- 2023-06-30
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 7 with no ROA
- ROAs
- 0 authorising AS3743
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 7 announcements
- Route objects
- 0 naming AS3743
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: 447 networks and 1,845 prefixes, as published 2026-10-31. 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