Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS3743

Announcement observedARIN

ARCEL-2 - Cleveland Cliffs Steel LLC · ARCEL-2

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/19/2026, 13:16:12Snapshot expired

View network topology RDAP registration

ASN: AS3743
Registration country: United States
Name: ARCEL-2 - Cleveland Cliffs Steel LLC
Abbreviation: ARCEL-2
Registration date: 9/9/2009, 17:06:31
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
156.144.100.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
156.144.108.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
156.144.109.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
156.144.208.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
156.144.249.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
156.144.51.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
156.144.99.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 00:00:00	10/22/2026, 08:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: ARCEL-2 - Cleveland Cliffs Steel LLC
RIR: ARIN
Registration country: United States
Registration date: 9/9/2009, 17:06:31
Abuse contact: arinadmin@clevelandcliffs.com

Snapshot trend

10/19/2026, 13:16:127 v40 v61 Upstream · 0 Uncertain

10/19/2026, 13:08:227 v40 v61 Upstream · 0 Uncertain

9/29/2026, 10:57:317 v40 v61 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · rir-rdap-asn · iana-rdap-asn-bootstrap