ASN AS239 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS239?

AS239 is listed under University of Toronto.

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?

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AS239 University of Toronto | IPGeolocation.io

ASN Lookup Tool

University of Toronto utoronto.ca

CA 18 Routes

AS Data

AS239

AS239 – University of Toronto

AS Number	239
AS Name	UTORONTO-AS
Organization	University of Toronto (univer-36)
Country	CA
Website	utoronto.ca
Number of IPv4 Routes	15
Number of IPv6 Routes	3
ASN type	EDUCATION
Registry	ARIN
Date Allocated	1988-09-20

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Use ASN data for AS239 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
192.75.254.0/24	AS239	University of Toronto	University of Toronto	256
142.150.128.0/17	AS239	University of Toronto	University of Toronto	32768
142.150.0.0/16	AS239	University of Toronto	University of Toronto	65536
2631:1002:22::/48	AS239	University of Toronto	University of Toronto	~1×10²⁴
192.82.128.0/22	AS239	University of Toronto	University of Toronto	1024
192.12.176.0/21	AS239	University of Toronto	University of Toronto	2048
142.151.0.0/16	AS239	University of Toronto	University of Toronto	65536
138.51.0.0/16	AS239	University of Toronto	University of Toronto	65536
138.51.128.0/17	AS239	University of Toronto	University of Toronto	32768
142.1.0.0/16	AS239	University of Toronto	University of Toronto	65536
192.12.174.0/24	AS239	University of Toronto	University of Toronto	256
2606:fa00::/32	AS239	University of Toronto	University of Toronto	~79×10²⁷
138.51.0.0/17	AS239	University of Toronto	University of Toronto	32768
2631:1000::/24	AS239	University of Toronto	University of Toronto	~20×10³⁰
142.151.128.0/17	AS239	University of Toronto	University of Toronto	32768
128.100.0.0/16	AS239	University of Toronto	University of Toronto	65536
142.151.0.0/17	AS239	University of Toronto	University of Toronto	32768
142.150.0.0/17	AS239	University of Toronto	University of Toronto	32768

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:       239
ASName:         UTORONTO-AS
ASHandle:       AS239
RegDate:        1988-09-20
Updated:        2009-07-31
Ref:            https://rdap.arin.net/registry/autnum/239


OrgName:        University of Toronto
OrgId:          UNIVER-36
Address:        Information & Technology Services
Address:        4 Bancroft Avenue
Address:        ROOM 101C
City:           TORONTO
StateProv:      ON
PostalCode:     M5S 1C1
Country:        CA
RegDate:        1988-09-20
Updated:        2025-10-20
Ref:            https://rdap.arin.net/registry/entity/UNIVER-36


OrgNOCHandle: DCA264-ARIN
OrgNOCName:   Carson, Douglas 
OrgNOCPhone:  +1-416-879-3684 
OrgNOCEmail:  doug.carson@utoronto.ca
OrgNOCRef:    https://rdap.arin.net/registry/entity/DCA264-ARIN

OrgTechHandle: RS2206-ARIN
OrgTechName:   Sutherland, Russell 
OrgTechPhone:  +1-416-803-0080 
OrgTechEmail:  russell.sutherland@utoronto.ca
OrgTechRef:    https://rdap.arin.net/registry/entity/RS2206-ARIN

OrgTechHandle: NSTEC-ARIN
OrgTechName:   NS-TECH
OrgTechPhone:  +1-416-978-4621 
OrgTechEmail:  eis.net.eng@utoronto.ca
OrgTechRef:    https://rdap.arin.net/registry/entity/NSTEC-ARIN

OrgAbuseHandle: RS2206-ARIN
OrgAbuseName:   Sutherland, Russell 
OrgAbusePhone:  +1-416-803-0080 
OrgAbuseEmail:  russell.sutherland@utoronto.ca
OrgAbuseRef:    https://rdap.arin.net/registry/entity/RS2206-ARIN

OrgAbuseHandle: NSTEC-ARIN
OrgAbuseName:   NS-TECH
OrgAbusePhone:  +1-416-978-4621 
OrgAbuseEmail:  eis.net.eng@utoronto.ca
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NSTEC-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" : "239",
    "as_handle" : "AS239",
    "as_name" : "UTORONTO-AS",
    "tech_contacts" : [ "RS2206-ARIN", "NSTEC-ARIN" ],
    "abuse_contacts" : [ "RS2206-ARIN", "NSTEC-ARIN" ],
    "date_created" : "1988-09-20",
    "date_updated" : "2009-07-31",
    "source" : "https://rdap.arin.net/registry/autnum/239"
  } ],
  "organization" : {
    "handle" : "UNIVER-36",
    "name" : "University of Toronto",
    "address" : [ "Information & Technology Services", "4 Bancroft Avenue", "ROOM 101C", "TORONTO", "ON", "M5S1C1", "CA" ],
    "street" : "Bancroft Avenue",
    "city" : "Toronto",
    "state" : "ON",
    "zip_code" : "M5S1C1",
    "country" : [ "CA" ],
    "date_created" : "1988-09-20",
    "date_updated" : "2025-10-20",
    "source" : "https://rdap.arin.net/registry/entity/UNIVER-36",
    "addressCountry" : "CA"
  },
  "technical_contacts" : [ {
    "handle" : "RS2206-ARIN",
    "name" : "Sutherland, Russell",
    "email" : [ "russell.sutherland@utoronto.ca" ],
    "phone" : [ "+1-416-803-0080" ],
    "source" : "https://rdap.arin.net/registry/entity/RS2206-ARIN"
  }, {
    "handle" : "NSTEC-ARIN",
    "name" : "NS-TECH",
    "email" : [ "eis.net.eng@utoronto.ca" ],
    "phone" : [ "+1-416-978-4621" ],
    "source" : "https://rdap.arin.net/registry/entity/NSTEC-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "RS2206-ARIN",
    "name" : "Sutherland, Russell",
    "email" : [ "russell.sutherland@utoronto.ca" ],
    "phone" : [ "+1-416-803-0080" ],
    "source" : "https://rdap.arin.net/registry/entity/RS2206-ARIN"
  }, {
    "handle" : "NSTEC-ARIN",
    "name" : "NS-TECH",
    "email" : [ "eis.net.eng@utoronto.ca" ],
    "phone" : [ "+1-416-978-4621" ],
    "source" : "https://rdap.arin.net/registry/entity/NSTEC-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS1403	EBOX	CA
AS24482	SG.GS	SG
AS22652	Videotron Ltee	CA
AS11670	Toronto Internet Exchange Community	CA
AS33044	Megawire Inc.	CA
AS6939	Hurricane Electric LLC	US
AS20473	The Constant Company, LLC	US
AS26677	ORION	CA
AS14537	Continent 8 LLC	US
AS399337	Netcrawler Inc	CA
AS5645	TekSavvy Solutions, Inc.	CA
AS835	GoCodeIT Inc	CA
AS394256	Tech Futures Interactive Inc.	CA
AS35280	F5 Networks SARL	FR
AS36236	NetActuate, Inc	US
AS4455	IX Reach Ltd	GB
AS16276	OVH SAS	FR
AS1828	Unitas Global	US
AS33185	Hive Data Center Inc.	CA
AS49544	i3D.net B.V	NL

Upstreams

AS Number	Description	Country
AS394256	Tech Futures Interactive Inc.	CA
AS6939	Hurricane Electric LLC	US
AS20473	The Constant Company, LLC	US
AS26677	ORION	CA