This AS is not currently used to announce prefixes in the global routing table, nor is it used as a visible transit AS.
whois: 402603
IANA has recorded AS3743 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS3743\n
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
ASNumber: 3743
ASName: ARCEL-2
ASHandle: AS3743
RegDate: 2009-09-09
Updated: 2023-06-30
Comment: WDS3-ARIN00
Ref: https://rdap.arin.net/registry/autnum/3743
OrgName: Cleveland Cliffs Steel LLC
OrgId: ARCEL-2
Address: 1 SOUTH DEARBORN, 19TH FLOOR
City: CHICAGO
StateProv: IL
PostalCode: 60603
Country: US
RegDate: 2009-08-14
Updated: 2025-11-24
Ref: https://rdap.arin.net/registry/entity/ARCEL-2
OrgNOCHandle: ABUSE9467-ARIN
OrgNOCName: Abuse
OrgNOCPhone: +1-216-694-5700
OrgNOCEmail: arinadmin@clevelandcliffs.com
OrgNOCRef: https://rdap.arin.net/registry/entity/ABUSE9467-ARIN
OrgAbuseHandle: ABUSE9467-ARIN
OrgAbuseName: Abuse
OrgAbusePhone: +1-216-694-5700
OrgAbuseEmail: arinadmin@clevelandcliffs.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE9467-ARIN
OrgTechHandle: ABUSE9467-ARIN
OrgTechName: Abuse
OrgTechPhone: +1-216-694-5700
OrgTechEmail: arinadmin@clevelandcliffs.com
OrgTechRef: https://rdap.arin.net/registry/entity/ABUSE9467-ARIN
RTechHandle: MPC47-ARIN
RTechName: Collins, Michelle P
RTechPhone: +1-724-284-2034
RTechEmail: michelle.collins@clevelandcliffs.com
RTechRef: https://rdap.arin.net/registry/entity/MPC47-ARIN
RAbuseHandle: MPC47-ARIN
RAbuseName: Collins, Michelle P
RAbusePhone: +1-724-284-2034
RAbuseEmail: michelle.collins@clevelandcliffs.com
RAbuseRef: https://rdap.arin.net/registry/entity/MPC47-ARIN
RNOCHandle: MPC47-ARIN
RNOCName: Collins, Michelle P
RNOCPhone: +1-724-284-2034
RNOCEmail: michelle.collins@clevelandcliffs.com
RNOCRef: https://rdap.arin.net/registry/entity/MPC47-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#