Report for 21833

Name

TRINITY-HEALTH - Trinity Health Corporation, 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.

21833 TRINITY-HEALTH, US

  Adjacency:     4  Upstream:     3  Downstream:     1
  Upstream Adjacent AS list
    AS218333        --No Registry Entry--
    AS17378         AS17378, US
    AS174           COGENT-174, US
  Downstream Adjacent AS list
    AS218333        --No Registry Entry--

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
15896 AS21833        ORIGIN  Originate:       4608 /19.83  Transit:          0 /0.00  TRINITY-HEALTH, 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       %
16186 AS21833       TRINITY-HEALTH, US                                 4      3      1      2      2  50.00%


  Prefix               AS Path                              Aggregation Suggestion
  170.232.224.0/20     2914 174 21833       + Announce - aggregate of 170.232.224.0/21 (2914 174 21833) and 170.232.232.0/21 (2914 174 21833)
  170.232.224.0/21     2914 174 21833       - Withdrawn - aggregated with 170.232.232.0/21 (2914 174 21833)
  170.232.231.0/24     2914 174 21833       - Withdrawn - matching aggregate 170.232.224.0/21 2914 174 21833
  170.232.232.0/21     2914 174 21833       - Withdrawn - aggregated with 170.232.224.0/21 (2914 174 21833)
  170.232.235.0/24     49788 174 21833        

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

AS21833   3 More Specifics   3 Total Advertisements   TRINITY-HEALTH, US
    170.232.224.0/21              170.232.0.0/16
    170.232.231.0/24              170.232.0.0/16
    170.232.232.0/21              170.232.0.0/16

Whois Entry

whois: 402590

IANA has recorded AS21833 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21833\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:       21833
             ASName:         TRINITY-HEALTH
             ASHandle:       AS21833
             RegDate:        2005-08-16
             Updated:        2021-12-17
             Ref:            https://rdap.arin.net/registry/autnum/21833
             
             
             OrgName:        Trinity Health Corporation
             OrgId:          THC-93
             Address:        20555 Victor Parkway
             City:           Livonia
             StateProv:      MI
             PostalCode:     48152
             Country:        US
             RegDate:        2021-10-06
             Updated:        2021-10-06
             Ref:            https://rdap.arin.net/registry/entity/THC-93
             
             
             OrgRoutingHandle: JBR146-ARIN
             OrgRoutingName:   Reid, Jeremy B
             OrgRoutingPhone:  +1-734-343-0670 
             OrgRoutingEmail:  reidjer@trinity-health.org
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/JBR146-ARIN
             
             OrgAbuseHandle: ABUSE997-ARIN
             OrgAbuseName:   Abuse Reporting
             OrgAbusePhone:  +1-888-667-3003 
             OrgAbuseEmail:  abuse@trinity-health.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE997-ARIN
             
             OrgDNSHandle: HASLE30-ARIN
             OrgDNSName:   Haslett, Jim 
             OrgDNSPhone:  +1-734-343-2277 
             OrgDNSEmail:  haslettj@trinity-health.org
             OrgDNSRef:    https://rdap.arin.net/registry/entity/HASLE30-ARIN
             
             OrgTechHandle: JBR146-ARIN
             OrgTechName:   Reid, Jeremy B
             OrgTechPhone:  +1-734-343-0670 
             OrgTechEmail:  reidjer@trinity-health.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/JBR146-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.
             #