Report for 4

Name

ISI-AS - University of Southern California, US

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.

4 ISI-AS - University of Southern California, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS10886         MAX-GIGAPOP - University of Maryland, US
    AS174           COGENT-174 - Cogent Communications, LLC, US
    AS226           LOS-NETTOS-AS - Los Nettos, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
3093  AS4            ORIGIN  Originate:      68864 /15.93  Transit:          0 /0.00  ISI-AS - University of Southern California, US

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       %
 2228 AS4           ISI-AS - University of Southern California, U     40     28      3     15     25  62.50%


  Prefix               AS Path                              Aggregation Suggestion
  128.9.0.0/20         4777 2516 226 4        
  128.9.16.0/22        4777 2516 226 4      + Announce - aggregate of 128.9.16.0/23 (4777 2516 226 4) and 128.9.18.0/23 (4777 2516 226 4)
  128.9.16.0/24        4777 2516 226 4      - Withdrawn - aggregated with 128.9.17.0/24 (4777 2516 226 4)
  128.9.17.0/24        4777 2516 226 4      - Withdrawn - aggregated with 128.9.16.0/24 (4777 2516 226 4)
  128.9.18.0/24        4777 2516 226 4      - Withdrawn - aggregated with 128.9.19.0/24 (4777 2516 226 4)
  128.9.19.0/24        4777 2516 226 4      - Withdrawn - aggregated with 128.9.18.0/24 (4777 2516 226 4)
  128.9.26.0/24        4777 2516 226 4        
  128.9.28.0/23        4777 2516 226 4        
  128.9.30.0/24        4777 2516 226 4        
  128.9.31.0/24        4777 2516 174 4        
  128.9.32.0/20        4777 2516 226 4        
  128.9.34.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.35.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.36.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.37.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.38.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.40.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.43.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.44.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.46.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.47.0/24        4777 2516 226 4      - Withdrawn - matching aggregate 128.9.32.0/20 4777 2516 226 4
  128.9.48.0/20        4777 2497 1299 10886 4   
  128.9.64.0/18        4777 2516 226 4      + Announce - aggregate of 128.9.64.0/19 (4777 2516 226 4) and 128.9.96.0/19 (4777 2516 226 4)
  128.9.64.0/20        4777 2516 226 4      - Withdrawn - aggregated with 128.9.80.0/20 (4777 2516 226 4)
  128.9.80.0/20        4777 2516 226 4      - Withdrawn - aggregated with 128.9.64.0/20 (4777 2516 226 4)
  128.9.96.0/20        4777 2516 226 4      - Withdrawn - aggregated with 128.9.112.0/20 (4777 2516 226 4)
  128.9.112.0/20       4777 2516 226 4      - Withdrawn - aggregated with 128.9.96.0/20 (4777 2516 226 4)
  128.9.113.0/24       4777 2516 226 4      - Withdrawn - matching aggregate 128.9.112.0/20 4777 2516 226 4
  128.9.117.0/24       4777 2516 226 4      - Withdrawn - matching aggregate 128.9.112.0/20 4777 2516 226 4
  128.9.122.0/24       4777 2516 226 4      - Withdrawn - matching aggregate 128.9.112.0/20 4777 2516 226 4
  128.9.123.0/24       4777 2516 226 4      - Withdrawn - matching aggregate 128.9.112.0/20 4777 2516 226 4
  128.9.127.0/24       4777 2516 226 4      - Withdrawn - matching aggregate 128.9.112.0/20 4777 2516 226 4
  128.9.128.0/17       4777 2516 226 4      + Announce - aggregate of 128.9.128.0/18 (4777 2516 226 4) and 128.9.192.0/18 (4777 2516 226 4)
  128.9.128.0/20       4777 2516 226 4      - Withdrawn - aggregated with 128.9.144.0/20 (4777 2516 226 4)
  128.9.144.0/20       4777 2516 226 4      - Withdrawn - aggregated with 128.9.128.0/20 (4777 2516 226 4)
  128.9.160.0/20       4777 2516 226 4      - Withdrawn - aggregated with 128.9.176.0/20 (4777 2516 226 4)
  128.9.176.0/20       4777 2516 226 4      - Withdrawn - aggregated with 128.9.160.0/20 (4777 2516 226 4)
  128.9.192.0/18       4777 2516 226 4      - Withdrawn - aggregated with 128.9.128.0/18 (4777 2516 226 4)
  198.32.16.0/24       4777 2516 226 4        
  206.117.6.0/24       4777 2516 226 4        
  206.117.27.0/24      4777 2516 226 4        
  206.117.31.0/24      4777 2516 226 4        
  206.117.37.0/24      4777 2516 226 4        

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

AS4   40 More Specifics   40 Total Advertisements   ISI-AS - University of Southern California, US
    128.9.0.0/20                  128.9.0.0/16
    128.9.16.0/24                 128.9.0.0/16
    128.9.17.0/24                 128.9.0.0/16
    128.9.18.0/24                 128.9.0.0/16
    128.9.19.0/24                 128.9.0.0/16
    128.9.26.0/24                 128.9.0.0/16
    128.9.28.0/23                 128.9.0.0/16
    128.9.30.0/24                 128.9.0.0/16
    128.9.31.0/24                 128.9.0.0/16
    128.9.32.0/20                 128.9.0.0/16
    128.9.34.0/24                 128.9.0.0/16
    128.9.35.0/24                 128.9.0.0/16
    128.9.36.0/24                 128.9.0.0/16
    128.9.37.0/24                 128.9.0.0/16
    128.9.38.0/24                 128.9.0.0/16
    128.9.40.0/24                 128.9.0.0/16
    128.9.43.0/24                 128.9.0.0/16
    128.9.44.0/24                 128.9.0.0/16
    128.9.46.0/24                 128.9.0.0/16
    128.9.47.0/24                 128.9.0.0/16
    128.9.48.0/20                 128.9.0.0/16
    128.9.64.0/20                 128.9.0.0/16
    128.9.80.0/20                 128.9.0.0/16
    128.9.96.0/20                 128.9.0.0/16
    128.9.112.0/20                128.9.0.0/16
    128.9.113.0/24                128.9.0.0/16
    128.9.117.0/24                128.9.0.0/16
    128.9.122.0/24                128.9.0.0/16
    128.9.123.0/24                128.9.0.0/16
    128.9.127.0/24                128.9.0.0/16
    128.9.128.0/20                128.9.0.0/16
    128.9.144.0/20                128.9.0.0/16
    128.9.160.0/20                128.9.0.0/16
    128.9.176.0/20                128.9.0.0/16
    128.9.192.0/18                128.9.0.0/16
    198.32.16.0/24                198.32.16.0/20
    206.117.6.0/24                206.117.0.0/16
    206.117.27.0/24               206.117.0.0/16
    206.117.31.0/24               206.117.0.0/16
    206.117.37.0/24               206.117.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS4 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS4\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:       4
             ASName:         ISI-AS
             ASHandle:       AS4
             RegDate:        1984-02-22
             Updated:        2023-09-29
             Ref:            https://rdap.arin.net/registry/autnum/4
             
             
             OrgName:        University of Southern California
             OrgId:          USC-32-Z
             Address:        Information Sciences Institute
             Address:        4676 Admiralty Way, Suite 1001
             City:           Marina del Rey
             StateProv:      CA
             PostalCode:     90292
             Country:        US
             RegDate:        2023-09-08
             Updated:        2023-09-21
             Ref:            https://rdap.arin.net/registry/entity/USC-32-Z
             
             
             OrgTechHandle: ACT-ORG-ARIN
             OrgTechName:   IPC Computing Services
             OrgTechPhone:  +1-310-448-8289 
             OrgTechEmail:  action@isi.edu
             OrgTechRef:    https://rdap.arin.net/registry/entity/ACT-ORG-ARIN
             
             OrgAbuseHandle: ACT-ORG-ARIN
             OrgAbuseName:   IPC Computing Services
             OrgAbusePhone:  +1-310-448-8289 
             OrgAbuseEmail:  action@isi.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ACT-ORG-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.
             #