Report for 27595

Name

COLUM-600 - Columbia College Chicago, 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.

27595 COLUM-600, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS6079          RCN-AS, US
    AS25645         MOMENTUM-ACCESS, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
24949 AS27595        ORIGIN  Originate:       2048 /21.00  Transit:          0 /0.00  COLUM-600, 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       %
21868 AS27595       COLUM-600, US                                      2      2      1      1      1  50.00%


  Prefix               AS Path                              Aggregation Suggestion
  199.168.232.0/21     6939 25645 27595 27595 27595 + Announce - aggregate of 199.168.232.0/22 (6939 25645 27595 27595 27595) and 199.168.236.0/22 (6939 25645 27595 27595 27595)
  199.168.232.0/22     6939 25645 27595 27595 27595 - Withdrawn - aggregated with 199.168.236.0/22 (6939 25645 27595 27595 27595)
  199.168.236.0/22     6939 25645 27595 27595 27595 - Withdrawn - aggregated with 199.168.232.0/22 (6939 25645 27595 27595 27595)

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

AS27595   2 More Specifics   2 Total Advertisements   COLUM-600, US
    199.168.232.0/22              199.168.232.0/21
    199.168.236.0/22              199.168.232.0/21

Whois Entry

whois: 402603

IANA has recorded AS27595 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS27595\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:       27595
             ASName:         COLUM-600
             ASHandle:       AS27595
             RegDate:        2011-03-09
             Updated:        2014-05-14
             Ref:            https://rdap.arin.net/registry/autnum/27595
             
             
             OrgName:        Columbia College Chicago
             OrgId:          COLUM-70
             Address:        600 S. Michigan Ave.
             City:           Chicago
             StateProv:      IL
             PostalCode:     60605
             Country:        US
             RegDate:        2010-03-08
             Updated:        2024-03-21
             Ref:            https://rdap.arin.net/registry/entity/COLUM-70
             
             
             OrgTechHandle: DUHRM-ARIN
             OrgTechName:   Duhr, Mike 
             OrgTechPhone:  +1-312-369-7879 
             OrgTechEmail:  mduhr@colum.edu
             OrgTechRef:    https://rdap.arin.net/registry/entity/DUHRM-ARIN
             
             OrgAbuseHandle: DUHRM-ARIN
             OrgAbuseName:   Duhr, Mike 
             OrgAbusePhone:  +1-312-369-7879 
             OrgAbuseEmail:  mduhr@colum.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/DUHRM-ARIN
             
             OrgAbuseHandle: MEDIN172-ARIN
             OrgAbuseName:   Medina, Edgar 
             OrgAbusePhone:  +1-312-369-7266 
             OrgAbuseEmail:  emedina@colum.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/MEDIN172-ARIN
             
             RAbuseHandle: DGAMA-ARIN
             RAbuseName:   D'Gama, Derrick 
             RAbusePhone:  +1-312-369-7110 
             RAbuseEmail:  ddgama@colum.edu
             RAbuseRef:    https://rdap.arin.net/registry/entity/DGAMA-ARIN
             
             RTechHandle: DGAMA-ARIN
             RTechName:   D'Gama, Derrick 
             RTechPhone:  +1-312-369-7110 
             RTechEmail:  ddgama@colum.edu
             RTechRef:    https://rdap.arin.net/registry/entity/DGAMA-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.
             #