Report for 36319

Name

ENWHC - NorthShore University HealthSystem, 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.

36319 ENWHC - NorthShore University HealthSystem, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS46887         CROWNCASTLE-AS46887 - Crown Castle Fiber LLC, US
    AS7018          ATT-INTERNET4 - AT&T Enterprises, LLC, US
    AS33491         COMCAST-33491 - Comcast Cable Communications, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
12720 AS36319        ORIGIN  Originate:       7168 /19.19  Transit:          0 /0.00  ENWHC - NorthShore University HealthSystem, 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       %
 8555 AS36319       ENWHC - NorthShore University HealthSystem, U     11      7      2      6      5  45.45%


  Prefix               AS Path                              Aggregation Suggestion
  198.251.16.0/23      4777 2516 7922 33491 36319   
  198.251.16.0/22      4777 2497 7018 36319 + Announce - aggregate of 198.251.16.0/23 (4777 2497 7018 36319) and 198.251.18.0/23 (4777 2497 7018 36319)
  198.251.16.0/24      4777 2497 7018 36319 - Withdrawn - aggregated with 198.251.17.0/24 (4777 2497 7018 36319)
  198.251.17.0/24      4777 2497 7018 36319 - Withdrawn - aggregated with 198.251.16.0/24 (4777 2497 7018 36319)
  198.251.18.0/23      4777 2497 7018 36319 - Withdrawn - aggregated with 198.251.16.0/23 (4777 2497 7018 36319)
  198.251.18.0/23      4777 2516 7922 33491 36319 + Announce - aggregate of 198.251.18.0/24 (4777 2516 7922 33491 36319) and 198.251.19.0/24 (4777 2516 7922 33491 36319)
  198.251.18.0/24      4777 2516 7922 33491 36319 - Withdrawn - aggregated with 198.251.19.0/24 (4777 2516 7922 33491 36319)
  198.251.19.0/24      4777 2516 7922 33491 36319 - Withdrawn - aggregated with 198.251.18.0/24 (4777 2516 7922 33491 36319)
  204.26.16.0/20       4608 7575 1299 46887 36319   
  204.26.27.0/24       4777 2516 7922 33491 36319   
  204.26.28.0/24       4777 2516 7922 33491 36319   
  204.26.29.0/24       4608 7575 1299 46887 36319 - Withdrawn - matching aggregate 204.26.16.0/20 4608 7575 1299 46887 36319
  204.26.30.0/24       4608 7575 1299 46887 36319 - Withdrawn - matching aggregate 204.26.16.0/20 4608 7575 1299 46887 36319

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

AS36319   10 More Specifics   11 Total Advertisements   ENWHC - NorthShore University HealthSystem, US
    198.251.16.0/23               198.251.16.0/21
    198.251.16.0/24               198.251.16.0/21
    198.251.17.0/24               198.251.16.0/21
    198.251.18.0/23               198.251.16.0/21
    198.251.18.0/24               198.251.16.0/21
    198.251.19.0/24               198.251.16.0/21
    204.26.27.0/24                204.26.16.0/20
    204.26.28.0/24                204.26.16.0/20
    204.26.29.0/24                204.26.16.0/20
    204.26.30.0/24                204.26.16.0/20

Whois Entry

whois: 402591

IANA has recorded AS36319 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS36319\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:       36319
             ASName:         ENWHC
             ASHandle:       AS36319
             RegDate:        2005-11-28
             Updated:        2012-03-02
             Ref:            https://rdap.arin.net/registry/autnum/36319
             
             
             OrgName:        NorthShore University HealthSystem
             OrgId:          ENHC
             Address:        4901 Searle Parkway
             City:           Skokie
             StateProv:      IL
             PostalCode:     60076
             Country:        US
             RegDate:        2005-10-12
             Updated:        2025-01-08
             Ref:            https://rdap.arin.net/registry/entity/ENHC
             
             
             OrgTechHandle: MSI141-ARIN
             OrgTechName:   Sinisi, Mike 
             OrgTechPhone:  +1-847-982-5416 
             OrgTechEmail:  msinisi@northshore.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/MSI141-ARIN
             
             OrgTechHandle: SMITH6239-ARIN
             OrgTechName:   Smith, Daniel 
             OrgTechPhone:  +1-630-527-5663 
             OrgTechEmail:  daniel.smith@endeavorhealth.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/SMITH6239-ARIN
             
             OrgAbuseHandle: MSI141-ARIN
             OrgAbuseName:   Sinisi, Mike 
             OrgAbusePhone:  +1-847-982-5416 
             OrgAbuseEmail:  msinisi@northshore.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/MSI141-ARIN
             
             OrgRoutingHandle: SMITH6239-ARIN
             OrgRoutingName:   Smith, Daniel 
             OrgRoutingPhone:  +1-630-527-5663 
             OrgRoutingEmail:  daniel.smith@endeavorhealth.org
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/SMITH6239-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.
             #