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AS53609 ArcelorMittal Dofasco G.P.

Q: Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

ASN Lookup Tool

ArcelorMittal Dofasco G.P. arcelormittal.com

CA 2 Routes

AS Data

AS53609

AS53609 – ArcelorMittal Dofasco G.P.

AS Number	53609
AS Name	AMDOFASCO-ASN
Organization	ArcelorMittal Dofasco G.P. (acmac)
Country	CA
Website	arcelormittal.com
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2024-08-01

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
142.153.3.0/24	AS53609	ArcelorMittal Dofasco G.P.	ArcelorMittal Dofasco G.P.	256
192.139.152.0/24	AS53609	Rogers Communications Canada Inc.	ArcelorMittal Dofasco G.P.	256

Raw Whois Response

#
# 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:       53609
ASName:         AMDOFASCO-ASN
ASHandle:       AS53609
RegDate:        2024-08-01
Updated:        2024-08-01
Ref:            https://rdap.arin.net/registry/autnum/53609


OrgName:        ArcelorMittal Dofasco G.P.
OrgId:          ACMAC
Address:        1330 Burlington Street East
City:           Hamilton
StateProv:      ON
PostalCode:     L8N 3J5
Country:        CA
RegDate:        2021-06-22
Updated:        2025-08-20
Ref:            https://rdap.arin.net/registry/entity/ACMAC


OrgTechHandle: TIZZA-ARIN
OrgTechName:   Tizzard, Mark 
OrgTechPhone:  +1-905-548-7200 
OrgTechEmail:  mark.tizzard@arcelormittal.com
OrgTechRef:    https://rdap.arin.net/registry/entity/TIZZA-ARIN

OrgAbuseHandle: LLL24-ARIN
OrgAbuseName:   Lilly, Louise Louise
OrgAbusePhone:  +1-905-548-7200 
OrgAbuseEmail:  LOUISE.LILLY@ARCELORMITTAL.COM
OrgAbuseRef:    https://rdap.arin.net/registry/entity/LLL24-ARIN

OrgAbuseHandle: TIZZA-ARIN
OrgAbuseName:   Tizzard, Mark 
OrgAbusePhone:  +1-905-548-7200 
OrgAbuseEmail:  mark.tizzard@arcelormittal.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/TIZZA-ARIN

OrgTechHandle: LLL24-ARIN
OrgTechName:   Lilly, Louise Louise
OrgTechPhone:  +1-905-548-7200 
OrgTechEmail:  LOUISE.LILLY@ARCELORMITTAL.COM
OrgTechRef:    https://rdap.arin.net/registry/entity/LLL24-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.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "53609",
    "as_handle" : "AS53609",
    "as_name" : "AMDOFASCO-ASN",
    "tech_contacts" : [ "TIZZA-ARIN", "LLL24-ARIN" ],
    "abuse_contacts" : [ "LLL24-ARIN", "TIZZA-ARIN" ],
    "date_created" : "2024-08-01",
    "date_updated" : "2024-08-01",
    "source" : "https://rdap.arin.net/registry/autnum/53609"
  } ],
  "organization" : {
    "handle" : "ACMAC",
    "name" : "ArcelorMittal Dofasco G.P.",
    "address" : [ "1330 Burlington Street East", "Hamilton", "ON", "L8N3J5", "CA" ],
    "street" : "Burlington Street East",
    "city" : "Hamilton",
    "state" : "ON",
    "zip_code" : "L8N3J5",
    "country" : [ "CA" ],
    "date_created" : "2021-06-22",
    "date_updated" : "2025-08-20",
    "source" : "https://rdap.arin.net/registry/entity/ACMAC",
    "addressCountry" : "CA"
  },
  "technical_contacts" : [ {
    "handle" : "TIZZA-ARIN",
    "name" : "Tizzard, Mark",
    "email" : [ "mark.tizzard@arcelormittal.com" ],
    "phone" : [ "+1-905-548-7200" ],
    "source" : "https://rdap.arin.net/registry/entity/TIZZA-ARIN"
  }, {
    "handle" : "LLL24-ARIN",
    "name" : "Lilly, Louise Louise",
    "email" : [ "LOUISE.LILLY@ARCELORMITTAL.COM" ],
    "phone" : [ "+1-905-548-7200" ],
    "source" : "https://rdap.arin.net/registry/entity/LLL24-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "LLL24-ARIN",
    "name" : "Lilly, Louise Louise",
    "email" : [ "LOUISE.LILLY@ARCELORMITTAL.COM" ],
    "phone" : [ "+1-905-548-7200" ],
    "source" : "https://rdap.arin.net/registry/entity/LLL24-ARIN"
  }, {
    "handle" : "TIZZA-ARIN",
    "name" : "Tizzard, Mark",
    "email" : [ "mark.tizzard@arcelormittal.com" ],
    "phone" : [ "+1-905-548-7200" ],
    "source" : "https://rdap.arin.net/registry/entity/TIZZA-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS812	Rogers Communications Canada Inc.	CA
AS577	Bell Canada	CA

Upstreams

AS Number	Description	Country
AS812	Rogers Communications Canada Inc.	CA
AS577	Bell Canada	CA

Frequently Asked Questions

What is ASN AS53609?

ASN AS53609 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS53609?

AS53609 is listed under ArcelorMittal Dofasco G.P..

What do peers, upstreams, and downstreams mean?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data included here?

WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access full ASN table data?

This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.