Report for 239

Name

UTORONTO-AS - University of Toronto, CA

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS2.0) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

239 UTORONTO-AS - University of Toronto, CA

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS26677         ORION-ASN - ORION, CA

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
668   AS239          ORIGIN  Originate:     527872 /12.99  Transit:          0 /0.00  UTORONTO-AS - University of Toronto, CA

Aggregation Suggestions

        Filter: Aggregates, Specifics

This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.

 Rank AS            AS Name                                      Current  Wthdw  Aggte  Annce Redctn       %
12027 AS239         UTORONTO-AS - University of Toronto, CA           15      6      3     12      3  20.00%


  Prefix               AS Path                              Aggregation Suggestion
  128.100.0.0/16       4777 2516 174 26677 239   
  138.51.0.0/16        4777 2516 174 26677 239   
  138.51.0.0/16        4777 2497 174 26677 239 + Announce - aggregate of 138.51.0.0/17 (4777 2497 174 26677 239) and 138.51.128.0/17 (4777 2497 174 26677 239)
  138.51.0.0/17        4777 2497 174 26677 239 - Withdrawn - aggregated with 138.51.128.0/17 (4777 2497 174 26677 239)
  138.51.128.0/17      4777 2497 174 26677 239 - Withdrawn - aggregated with 138.51.0.0/17 (4777 2497 174 26677 239)
  142.1.0.0/16         4777 2516 174 26677 239   
  142.150.0.0/16       4777 2516 174 26677 239   
  142.150.0.0/16       4777 2497 174 26677 239 + Announce - aggregate of 142.150.0.0/17 (4777 2497 174 26677 239) and 142.150.128.0/17 (4777 2497 174 26677 239)
  142.150.0.0/17       4777 2497 174 26677 239 - Withdrawn - aggregated with 142.150.128.0/17 (4777 2497 174 26677 239)
  142.150.128.0/17     4777 2497 174 26677 239 - Withdrawn - aggregated with 142.150.0.0/17 (4777 2497 174 26677 239)
  142.151.0.0/16       4777 2516 174 26677 239   
  142.151.0.0/16       4777 2497 174 26677 239 + Announce - aggregate of 142.151.0.0/17 (4777 2497 174 26677 239) and 142.151.128.0/17 (4777 2497 174 26677 239)
  142.151.0.0/17       4777 2497 174 26677 239 - Withdrawn - aggregated with 142.151.128.0/17 (4777 2497 174 26677 239)
  142.151.128.0/17     4777 2497 174 26677 239 - Withdrawn - aggregated with 142.151.0.0/17 (4777 2497 174 26677 239)
  192.12.174.0/24      4777 2497 174 26677 239   
  192.12.176.0/21      4777 2516 174 26677 239   
  192.75.254.0/24      4777 2516 174 26677 239   
  192.82.128.0/22      4777 2516 174 26677 239   

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS239   7 More Specifics   15 Total Advertisements   UTORONTO-AS - University of Toronto, CA
    138.51.0.0/17                 138.51.0.0/16
    138.51.128.0/17               138.51.0.0/16
    142.150.0.0/17                142.150.0.0/16
    142.150.128.0/17              142.150.0.0/16
    142.151.0.0/17                142.151.0.0/16
    142.151.128.0/17              142.151.0.0/16
    192.12.174.0/24               192.12.174.0/23

Whois Entry

whois: 402332

IANA has recorded AS239 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS239\n             
             #
             # 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
             
             
             OrgTechHandle: NSTEC-ARIN
             OrgTechName:   NS-TECH
             OrgTechPhone:  +1-416-803-0080 
             OrgTechEmail:  eis.net.eng@utoronto.ca
             OrgTechRef:    https://rdap.arin.net/registry/entity/NSTEC-ARIN
             
             OrgAbuseHandle: RS2206-ARIN
             OrgAbuseName:   Sutherland, Russell 
             OrgAbusePhone:  +1-416-978-6620 
             OrgAbuseEmail:  russell.sutherland@utoronto.ca
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/RS2206-ARIN
             
             OrgTechHandle: RS2206-ARIN
             OrgTechName:   Sutherland, Russell 
             OrgTechPhone:  +1-416-978-6620 
             OrgTechEmail:  russell.sutherland@utoronto.ca
             OrgTechRef:    https://rdap.arin.net/registry/entity/RS2206-ARIN
             
             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
             
             OrgAbuseHandle: NSTEC-ARIN
             OrgAbuseName:   NS-TECH
             OrgAbusePhone:  +1-416-803-0080 
             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.
             #