Report for 104

Name

COLORADO-AS - University of Colorado at Boulder, 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 AS6447) 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.

104 COLORADO-AS, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS3356          LEVEL3, US
    AS14041         AS14041, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
2480  AS104          ORIGIN  Originate:      91136 /15.52  Transit:          0 /0.00  COLORADO-AS, 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       %
 9743 AS104         COLORADO-AS, US                                   20      8      4     16      4  20.00%


  Prefix               AS Path                              Aggregation Suggestion
  128.138.0.0/16       293 14041 104          
  129.19.192.0/18      293 14041 104          
  146.5.20.0/22        293 14041 104          
  192.12.238.0/24      293 14041 104          
  192.12.240.0/23      293 14041 104        + Announce - aggregate of 192.12.240.0/24 (293 14041 104) and 192.12.241.0/24 (293 14041 104)
  192.12.240.0/24      293 14041 104        - Withdrawn - aggregated with 192.12.241.0/24 (293 14041 104)
  192.12.241.0/24      293 14041 104        - Withdrawn - aggregated with 192.12.240.0/24 (293 14041 104)
  192.12.242.0/24      293 14041 104          
  192.12.244.0/23      293 14041 104        + Announce - aggregate of 192.12.244.0/24 (293 14041 104) and 192.12.245.0/24 (293 14041 104)
  192.12.244.0/24      293 14041 104        - Withdrawn - aggregated with 192.12.245.0/24 (293 14041 104)
  192.12.245.0/24      293 14041 104        - Withdrawn - aggregated with 192.12.244.0/24 (293 14041 104)
  198.11.16.0/20       293 14041 104          
  198.59.7.0/24        293 14041 104          
  198.59.51.0/24       293 14041 104          
  198.59.52.0/24       293 14041 104          
  198.59.54.0/23       293 14041 104        + Announce - aggregate of 198.59.54.0/24 (293 14041 104) and 198.59.55.0/24 (293 14041 104)
  198.59.54.0/24       293 14041 104        - Withdrawn - aggregated with 198.59.55.0/24 (293 14041 104)
  198.59.55.0/24       293 14041 104        - Withdrawn - aggregated with 198.59.54.0/24 (293 14041 104)
  198.59.70.0/24       293 14041 104          
  198.59.81.0/24       293 14041 104          
  198.59.82.0/23       293 14041 104        + Announce - aggregate of 198.59.82.0/24 (293 14041 104) and 198.59.83.0/24 (293 14041 104)
  198.59.82.0/24       293 14041 104        - Withdrawn - aggregated with 198.59.83.0/24 (293 14041 104)
  198.59.83.0/24       293 14041 104        - Withdrawn - aggregated with 198.59.82.0/24 (293 14041 104)
  204.228.80.0/24      57866 3356 104         

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

AS104   5 More Specifics   18 Total Advertisements   COLORADO-AS, US
    146.5.20.0/22                 146.5.0.0/16
    198.59.54.0/24                198.59.54.0/23
    198.59.55.0/24                198.59.54.0/23
    198.59.82.0/24                198.59.82.0/23
    198.59.83.0/24                198.59.82.0/23

Prefixes added and withdrawn by this origin AS in the past 7 days.

    - 192.12.241.0/24             Withdrawn

Whois Entry

whois: 402603

IANA has recorded AS104 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS104\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:       104
             ASName:         COLORADO-AS
             ASHandle:       AS104
             RegDate:        1987-04-09
             Updated:        2019-06-25
             Ref:            https://rdap.arin.net/registry/autnum/104
             
             
             OrgName:        University of Colorado at Boulder
             OrgId:          UCAB-2
             Address:        Campus Box 455
             City:           Boulder
             StateProv:      CO
             PostalCode:     80309-0455
             Country:        US
             RegDate:        1987-04-09
             Updated:        2019-06-25
             Ref:            https://rdap.arin.net/registry/entity/UCAB-2
             
             
             OrgAbuseHandle: ABUSE306-ARIN
             OrgAbuseName:   Abuse
             OrgAbusePhone:  +1-303-735-4357 
             OrgAbuseEmail:  abuse@colorado.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE306-ARIN
             
             OrgTechHandle: CUBOU-ARIN
             OrgTechName:   CUBoulder
             OrgTechPhone:  +1-303-735-4357 
             OrgTechEmail:  arinadmin@colorado.edu
             OrgTechRef:    https://rdap.arin.net/registry/entity/CUBOU-ARIN
             
             RAbuseHandle: ABUSE306-ARIN
             RAbuseName:   Abuse
             RAbusePhone:  +1-303-735-4357 
             RAbuseEmail:  abuse@colorado.edu
             RAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE306-ARIN
             
             RTechHandle: CUBOU-ARIN
             RTechName:   CUBoulder
             RTechPhone:  +1-303-735-4357 
             RTechEmail:  arinadmin@colorado.edu
             RTechRef:    https://rdap.arin.net/registry/entity/CUBOU-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.
             #