Report for 19247

Name

AS19247 - Northwestern Memorial Hospital, 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.

19247 AS19247 - Northwestern Memorial Hospital, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS46887         CROWNCASTLE-AS46887 - Crown Castle Fiber LLC, US
    AS33491         COMCAST-33491 - Comcast Cable Communications, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
35044 AS19247        ORIGIN  Originate:       1024 /22.00  Transit:          0 /0.00  AS19247 - Northwestern Memorial Hospital, 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       %
20918 AS19247       AS19247 - Northwestern Memorial Hospital, US       4      2      1      3      1  25.00%


  Prefix               AS Path                              Aggregation Suggestion
  204.62.116.0/23      4777 2497 1299 46887 19247 + Announce - aggregate of 204.62.116.0/24 (4777 2497 1299 46887 19247) and 204.62.117.0/24 (4777 2497 1299 46887 19247)
  204.62.116.0/24      4777 2497 1299 46887 19247 - Withdrawn - aggregated with 204.62.117.0/24 (4777 2497 1299 46887 19247)
  204.62.117.0/24      4777 2497 1299 46887 19247 - Withdrawn - aggregated with 204.62.116.0/24 (4777 2497 1299 46887 19247)
  204.62.118.0/24      4777 2516 7922 33491 19247   
  204.62.119.0/24      4777 2516 1299 46887 19247   

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

AS19247   4 More Specifics   4 Total Advertisements   AS19247 - Northwestern Memorial Hospital, US
    204.62.116.0/24               204.62.116.0/22
    204.62.117.0/24               204.62.116.0/22
    204.62.118.0/24               204.62.116.0/22
    204.62.119.0/24               204.62.116.0/22

Whois Entry

whois: 402332

IANA has recorded AS19247 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS19247\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:       19247
             ASName:         AS19247
             ASHandle:       AS19247
             RegDate:        2017-07-07
             Updated:        2017-07-07
             Ref:            https://rdap.arin.net/registry/autnum/19247
             
             
             OrgName:        Northwestern Memorial Hospital
             OrgId:          NMH-1
             Address:        259 East Erie Street
             City:           Chicago
             StateProv:      IL
             PostalCode:     60611
             Country:        US
             RegDate:        1993-03-31
             Updated:        2024-03-19
             Ref:            https://rdap.arin.net/registry/entity/NMH-1
             
             
             OrgTechHandle: BROWJ2-ARIN
             OrgTechName:   Brow, John 
             OrgTechPhone:  +1-312-695-2244 
             OrgTechEmail:  jbrow@nm.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/BROWJ2-ARIN
             
             OrgDNSHandle: JOHNS4388-ARIN
             OrgDNSName:   Johnson, Terrance 
             OrgDNSPhone:  +1-312-926-5875 
             OrgDNSEmail:  tmjohnso@nm.org
             OrgDNSRef:    https://rdap.arin.net/registry/entity/JOHNS4388-ARIN
             
             OrgDNSHandle: BROWJ2-ARIN
             OrgDNSName:   Brow, John 
             OrgDNSPhone:  +1-312-695-2244 
             OrgDNSEmail:  jbrow@nm.org
             OrgDNSRef:    https://rdap.arin.net/registry/entity/BROWJ2-ARIN
             
             OrgTechHandle: JOHNS4388-ARIN
             OrgTechName:   Johnson, Terrance 
             OrgTechPhone:  +1-312-926-5875 
             OrgTechEmail:  tmjohnso@nm.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/JOHNS4388-ARIN
             
             OrgAbuseHandle: JOHNS4388-ARIN
             OrgAbuseName:   Johnson, Terrance 
             OrgAbusePhone:  +1-312-926-5875 
             OrgAbuseEmail:  tmjohnso@nm.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/JOHNS4388-ARIN
             
             OrgAbuseHandle: BROWJ2-ARIN
             OrgAbuseName:   Brow, John 
             OrgAbusePhone:  +1-312-695-2244 
             OrgAbuseEmail:  jbrow@nm.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/BROWJ2-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.
             #