ASN AS20045 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS20045?

AS20045 is listed under Toronto Hydro Electric System Limited.

What do peers, upstreams, and downstreams mean in ASN data?

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 shown for an ASN?

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

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS20045 Toronto Hydro Electric System Limited

ASN Lookup Tool

Toronto Hydro Electric System Limited torontohydro.com

CA 1 Routes

AS Data

AS20045

AS20045 – Toronto Hydro Electric System Limited

AS Number	20045
AS Name	TORHYDRO-CORP
Organization	Toronto Hydro Electric System Limited (thesl-5)
Country	CA
Website	torontohydro.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2009-01-02

ASN Intelligence API for production workflows

Use ASN data for AS20045 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
159.18.26.0/24	AS20045	Toronto Hydro Electric System Limited	Zayo Bandwidth	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:       20045
ASName:         TORHYDRO-CORP
ASHandle:       AS20045
RegDate:        2009-01-02
Updated:        2023-09-14
Comment:        NJA8-ARIN
Ref:            https://rdap.arin.net/registry/autnum/20045


OrgName:        Toronto Hydro Electric System Limited
OrgId:          THESL-5
Address:        14 Carlton St.
City:           Toronto
StateProv:      ON
PostalCode:     M5B-1K5
Country:        CA
RegDate:        2008-06-06
Updated:        2023-09-14
Ref:            https://rdap.arin.net/registry/entity/THESL-5


OrgNOCHandle: LOGAN121-ARIN
OrgNOCName:   Loganathan, Kumar 
OrgNOCPhone:  +1-416-542-2732 
OrgNOCEmail:  networkoperations@torontohydro.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/LOGAN121-ARIN

OrgAbuseHandle: LOGAN121-ARIN
OrgAbuseName:   Loganathan, Kumar 
OrgAbusePhone:  +1-416-542-2732 
OrgAbuseEmail:  networkoperations@torontohydro.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/LOGAN121-ARIN

OrgTechHandle: LOGAN121-ARIN
OrgTechName:   Loganathan, Kumar 
OrgTechPhone:  +1-416-542-2732 
OrgTechEmail:  networkoperations@torontohydro.com
OrgTechRef:    https://rdap.arin.net/registry/entity/LOGAN121-ARIN

RNOCHandle: LOGAN121-ARIN
RNOCName:   Loganathan, Kumar 
RNOCPhone:  +1-416-542-2732 
RNOCEmail:  networkoperations@torontohydro.com
RNOCRef:    https://rdap.arin.net/registry/entity/LOGAN121-ARIN

RTechHandle: LOGAN121-ARIN
RTechName:   Loganathan, Kumar 
RTechPhone:  +1-416-542-2732 
RTechEmail:  networkoperations@torontohydro.com
RTechRef:    https://rdap.arin.net/registry/entity/LOGAN121-ARIN

RAbuseHandle: LOGAN121-ARIN
RAbuseName:   Loganathan, Kumar 
RAbusePhone:  +1-416-542-2732 
RAbuseEmail:  networkoperations@torontohydro.com
RAbuseRef:    https://rdap.arin.net/registry/entity/LOGAN121-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" : "20045",
    "as_handle" : "AS20045",
    "as_name" : "TORHYDRO-CORP",
    "tech_contacts" : [ "LOGAN121-ARIN", "LOGAN121-ARIN" ],
    "abuse_contacts" : [ "LOGAN121-ARIN", "LOGAN121-ARIN" ],
    "date_created" : "2009-01-02",
    "date_updated" : "2023-09-14",
    "source" : "https://rdap.arin.net/registry/autnum/20045"
  } ],
  "organization" : {
    "handle" : "THESL-5",
    "name" : "Toronto Hydro Electric System Limited",
    "address" : [ "14 Carlton St.", "Toronto", "ON", "M5B-1K5", "CA" ],
    "street" : "Carlton St.",
    "city" : "Toronto",
    "state" : "ON",
    "zip_code" : "M5B-1K5",
    "country" : [ "CA" ],
    "date_created" : "2008-06-06",
    "date_updated" : "2023-09-14",
    "source" : "https://rdap.arin.net/registry/entity/THESL-5",
    "addressCountry" : "CA"
  },
  "technical_contacts" : [ {
    "handle" : "LOGAN121-ARIN",
    "name" : "Loganathan, Kumar",
    "email" : [ "networkoperations@torontohydro.com" ],
    "phone" : [ "+1-416-542-2732" ],
    "source" : "https://rdap.arin.net/registry/entity/LOGAN121-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "LOGAN121-ARIN",
    "name" : "Loganathan, Kumar",
    "email" : [ "networkoperations@torontohydro.com" ],
    "phone" : [ "+1-416-542-2732" ],
    "source" : "https://rdap.arin.net/registry/entity/LOGAN121-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS6461	Zayo Bandwidth	US
AS577	Bell Canada	CA

Upstreams

AS Number	Description	Country
AS6461	Zayo Bandwidth	US
AS577	Bell Canada	CA