Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS239

Announcement observedARIN

University of Toronto · UTORONTO-AS

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active9/28/2026, 20:37:12Snapshot expired

View network topology RDAP registration

ASN: AS239
Registration country: Canada
Name: University of Toronto
Abbreviation: UTORONTO-AS
Registration date: 9/20/1988, 04:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
128.100.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
138.51.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
138.51.0.0/17BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
138.51.128.0/17BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
142.1.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
142.150.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
142.150.0.0/17BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
142.150.128.0/17BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
142.151.0.0/16BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
142.151.0.0/17BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
142.151.128.0/17BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
192.12.174.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
192.12.176.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
192.75.254.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
192.82.128.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/14/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: University of Toronto
RIR: ARIN
Registration country: Canada
Registration date: 9/20/1988, 04:00:00
Abuse contact: eis.net.eng@utoronto.ca

Snapshot trend

9/28/2026, 20:37:1215 v43 v64 Upstream · 8 Uncertain

9/28/2026, 20:36:530 v40 v60 Upstream · 0 Uncertain

9/27/2026, 15:14:230 v40 v60 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn