Report for 29885

Name

UCHHS-AS - Univeristy of Chicago Hospitals & Health System, 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.

29885 UCHHS-AS - Univeristy of Chicago Hospitals & Health System, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS6325          ILLINOIS-CENTURY - Illinois Century Network, US
    AS7018          ATT-INTERNET4 - AT&T Enterprises, LLC, US
    AS32787         PROLEXIC-TECHNOLOGIES-DDOS-MITIGATION-NETWORK - Akamai Technologies, Inc., US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
1904  AS29885        ORIGIN  Originate:     131328 /15.00  Transit:          0 /0.00  UCHHS-AS - Univeristy of Chicago Hospitals & Health System, 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       %
21721 AS29885       UCHHS-AS - Univeristy of Chicago Hospitals &       4      2      1      3      1  25.00%


  Prefix               AS Path                              Aggregation Suggestion
  64.107.48.0/24       4777 32787 29885       
  165.68.0.0/16        4777 2497 7018 29885   
  165.68.0.0/16        4777 32787 29885     + Announce - aggregate of 165.68.0.0/17 (4777 32787 29885) and 165.68.128.0/17 (4777 32787 29885)
  165.68.0.0/17        4777 32787 29885     - Withdrawn - aggregated with 165.68.128.0/17 (4777 32787 29885)
  165.68.128.0/17      4777 32787 29885     - Withdrawn - aggregated with 165.68.0.0/17 (4777 32787 29885)

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

AS29885   3 More Specifics   4 Total Advertisements   UCHHS-AS - Univeristy of Chicago Hospitals & Health System, US
    64.107.48.0/24                64.107.0.0/16
    165.68.0.0/17                 165.68.0.0/16
    165.68.128.0/17               165.68.0.0/16

Whois Entry

whois: 402599

IANA has recorded AS29885 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS29885\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:       29885
             ASName:         UCHHS-AS
             ASHandle:       AS29885
             RegDate:        2003-05-29
             Updated:        2012-03-02
             Ref:            https://rdap.arin.net/registry/autnum/29885
             
             
             OrgName:        Univeristy of Chicago Hospitals & Health System
             OrgId:          UCHHS
             Address:        7955 South Cass Avenue
             City:           Darien
             StateProv:      IL
             PostalCode:     60651
             Country:        US
             RegDate:        2003-04-24
             Updated:        2025-12-08
             Ref:            https://rdap.arin.net/registry/entity/UCHHS
             
             
             OrgAbuseHandle: GRAML9-ARIN
             OrgAbuseName:   Gramlick, Martin 
             OrgAbusePhone:  +1-773-834-0008 
             OrgAbuseEmail:  martin.gramlick@uchicagomedicine.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/GRAML9-ARIN
             
             OrgTechHandle: GRAML9-ARIN
             OrgTechName:   Gramlick, Martin 
             OrgTechPhone:  +1-773-834-0008 
             OrgTechEmail:  martin.gramlick@uchicagomedicine.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/GRAML9-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.
             #