138.51.0.0/17

AS239 · University of Toronto

Need more data or want to access it via API or data downloads? Sign up to get free access

Summary

Country	Canada
Domain	utoronto.ca
ASN	AS239
Parent Range	138.51.0.0/16
Registry	ARIN
ID	CA-NET

WHOIS Details

NetHandle:      NET-138-51-0-0-1
OrgID:          UNIVER-36
Parent:         NET-138-0-0-0-0
NetName:        CA-NET
NetRange:       138.51.0.0 - 138.51.255.255
NetType:        allocation
RegDate:        1990-02-06
Updated:        2021-12-14
TechHandle:     NSTEC-ARIN
Source:         ARIN


OrgID:          UNIVER-36
OrgName:        University of Toronto
CanAllocate:    
Street:         Information & Technology Services
Street:         4 Bancroft Avenue
Street:         ROOM 101C
City:           TORONTO
State/Prov:     ON
Country:        CA
PostalCode:     M5S 1C1
RegDate:        1988-09-20
Updated:        2025-10-20
OrgAdminHandle: DCA264-ARIN
OrgTechHandle:  NSTEC-ARIN
OrgTechHandle:  RS2206-ARIN
OrgAbuseHandle: NSTEC-ARIN
OrgAbuseHandle: RS2206-ARIN
OrgNOCHandle:   DCA264-ARIN
Source:         ARIN


POCHandle:      DCA264-ARIN
IsRole:         N
LastName:       Carson
FirstName:      Douglas
Street:         4 Bancroft Avenue, #121B
City:           Toronto
State/Prov:     ON
Country:        CA
PostalCode:     M5S-1C1
RegDate:        2009-06-02
Updated:        2024-10-22
OfficePhone:    +1-416-978-3855
MobilePhone:    +1-416-879-3684
FaxPhone:       +1-416-978-6620
Mailbox:        [email protected]
Source:         ARIN


POCHandle:      NSTEC-ARIN
IsRole:         Y
LastName:       NS-TECH
FirstName:      
Street:         Information & Technology Services
Street:         4 Bancroft Avenue, Room 102
City:           Toronto
State/Prov:     ON
Country:        CA
PostalCode:     M5S 1C1
RegDate:        2002-09-19
Updated:        2025-10-09
OfficePhone:    +1-416-978-4621
MobilePhone:    +1-416-803-0080
FaxPhone:       +1-416-978-6620
Mailbox:        [email protected]
Source:         ARIN


POCHandle:      RS2206-ARIN
IsRole:         N
LastName:       Sutherland
FirstName:      Russell
Street:         4 Bancroft Avenue
Street:         Room 102
City:           Toronto
State/Prov:     ON
Country:        CA
PostalCode:     M5S 1C1
RegDate:        1996-05-02
Updated:        2025-10-09
OfficePhone:    +1-416-978-0470
MobilePhone:    +1-416-803-0080
FaxPhone:       +1-416-978-6620
Mailbox:        [email protected]
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 138.51.0.0/17

Range	ASN	Company	Num of IPs
138.51.0.0/16	AS239	University of Toronto	65,536

Nearby Ranges

BGP prefixes that overlap with 138.51.0.0/16

Range	ASN	Company	Num of IPs
138.51.0.0/16	AS239	University of Toronto	65,536

Hosted domains

There are 3 domain names hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
138.51.89.209	weartech.com	3

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

18 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
138.51.24.220	AS239 University of Toronto	`0.36ms` from Toronto, CA

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
83.85.112.1	AS33915 Vodafone Libertel B.V.	`4.97ms` from Amsterdam, NL
77.251.207.1	AS33915 Vodafone Libertel B.V.	`3.70ms` from Amsterdam, NL
73.99.13.1	AS7922 Comcast Cable Communications, LLC	`7.45ms` from Ashburn, US
152.202.129.33	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`9.32ms` from Bogota, CO
216.128.237.225	AS26223 Silver Star Communications	`10.47ms` from Boise, US
177.5.208.1	AS8167 V tal	`17.15ms` from Brasilia, BR
149.135.61.1	AS1221 Telstra Limited	`0.77ms` from Brisbane, AU
152.168.5.1	AS7303 Telecom Argentina S.A.	`3.67ms` from Buenos Aires, AR
129.128.73.1	AS3359 University of Alberta	`5.55ms` from Calgary, CA
198.105.227.1	AS54869 Rockman Communications, Inc.	`12.57ms` from Chicago, US
104.187.244.1	AS7018 AT&T Enterprises, LLC	`10.12ms` from Chicago, US
27.12.66.1	AS4837 CHINA UNICOM China169 Backbone	`1.46ms` from Chongqing, CN
41.75.223.17	AS37133 Airtel Tanzania	`0.86ms` from Dar es Salaam, TZ
109.255.156.1	AS6830 Liberty Global Europe Holding B.V.	`6.56ms` from Dublin, IE
121.35.44.1	AS4134 CHINANET-BACKBONE	`1.10ms` from Guangzhou, CN
61.243.10.177	AS4837 CHINA UNICOM China169 Backbone	`1.64ms` from Guiyang, CN
60.177.138.1	AS4134 CHINANET-BACKBONE	`5.61ms` from Hangzhou, CN
103.233.254.1	AS401696 cognetcloud INC	`0.24ms` from Hong Kong, HK
114.142.154.1	AS9584 Diyixian.com Limited	`0.85ms` from Hong Kong, HK
180.124.167.65	AS4134 CHINANET-BACKBONE	`8.75ms` from Huai'an, CN
103.76.16.81	AS131111 PT Mora Telematika Indonesia	`1.28ms` from Jakarta, ID
196.214.191.225	AS3741 Dimension Data	`8.56ms` from Johannesburg, ZA
79.135.198.49	AS44078 Skyline Electronics Ltd.	`6.88ms` from Kyiv, UA
194.249.194.129	AS2107 ARNES	`0.71ms` from Ljubljana, SI
82.19.44.1	AS5089 Virgin Media Limited	`5.52ms` from London, GB

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f2 -m7 138.51.108.22

traceroute to 138.51.108.22 (138.51.108.22): 7 hops max, 52 byte packets

2 [AS20119] 144.208.88.29 0.222 ms

3 *

4 [AS174] 154.24.56.105 1.559 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Calgary, CA

On December 6th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales