Report for 26912

Name

NCH-AS1 - Northwest Community 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 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.

26912 NCH-AS1, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS7018          ATT-INTERNET4, US
    AS33491         COMCAST-33491, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
30642 AS26912        ORIGIN  Originate:       1536 /21.42  Transit:          0 /0.00  NCH-AS1, 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       %
21859 AS26912       NCH-AS1, US                                        6      2      1      5      1  16.67%


  Prefix               AS Path                              Aggregation Suggestion
  50.201.62.0/24       3257 7922 33491 26912   
  198.251.23.0/24      7018 7922 33491 26912   
  198.251.24.0/23      7018 7922 33491 26912 + Announce - aggregate of 198.251.24.0/24 (7018 7922 33491 26912) and 198.251.25.0/24 (7018 7922 33491 26912)
  198.251.24.0/24      7018 7922 33491 26912 - Withdrawn - aggregated with 198.251.25.0/24 (7018 7922 33491 26912)
  198.251.25.0/24      7018 7922 33491 26912 - Withdrawn - aggregated with 198.251.24.0/24 (7018 7922 33491 26912)
  198.251.26.0/24      7018 26912             
  198.251.30.0/24      293 3356 33491 26912   

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

AS26912   5 More Specifics   6 Total Advertisements   NCH-AS1, US
    50.201.62.0/24                50.128.0.0/9
    198.251.23.0/24               198.251.16.0/21
    198.251.24.0/24               198.251.24.0/22
    198.251.25.0/24               198.251.24.0/22
    198.251.26.0/24               198.251.24.0/22

Whois Entry

whois: 402590

IANA has recorded AS26912 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS26912\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:       26912
             ASName:         NCH-AS1
             ASHandle:       AS26912
             RegDate:        2017-10-18
             Updated:        2017-10-18
             Ref:            https://rdap.arin.net/registry/autnum/26912
             
             
             OrgName:        Northwest Community Hospital
             OrgId:          NCH-1
             Address:        800 West Central Road
             City:           Arlington Heights
             StateProv:      IL
             PostalCode:     60005
             Country:        US
             RegDate:        1993-08-30
             Updated:        2025-01-08
             Ref:            https://rdap.arin.net/registry/entity/NCH-1
             
             
             OrgDNSHandle: DUKIC2-ARIN
             OrgDNSName:   Dukich, Paul 
             OrgDNSPhone:  +1-847-618-4887 
             OrgDNSEmail:  pdukich@gmail.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/DUKIC2-ARIN
             
             OrgRoutingHandle: DUKIC2-ARIN
             OrgRoutingName:   Dukich, Paul 
             OrgRoutingPhone:  +1-847-618-4887 
             OrgRoutingEmail:  pdukich@gmail.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/DUKIC2-ARIN
             
             OrgAbuseHandle: DUKIC2-ARIN
             OrgAbuseName:   Dukich, Paul 
             OrgAbusePhone:  +1-847-618-4887 
             OrgAbuseEmail:  pdukich@gmail.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/DUKIC2-ARIN
             
             OrgAbuseHandle: MARKA51-ARIN
             OrgAbuseName:   Eilken, Mark A
             OrgAbusePhone:  +1-847-618-4834 
             OrgAbuseEmail:  meilken@nch.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/MARKA51-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
             
             OrgTechHandle: DUKIC2-ARIN
             OrgTechName:   Dukich, Paul 
             OrgTechPhone:  +1-847-618-4887 
             OrgTechEmail:  pdukich@gmail.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/DUKIC2-ARIN
             
             OrgTechHandle: MARKA51-ARIN
             OrgTechName:   Eilken, Mark A
             OrgTechPhone:  +1-847-618-4834 
             OrgTechEmail:  meilken@nch.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/MARKA51-ARIN
             
             OrgNOCHandle: DUKIC2-ARIN
             OrgNOCName:   Dukich, Paul 
             OrgNOCPhone:  +1-847-618-4887 
             OrgNOCEmail:  pdukich@gmail.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/DUKIC2-ARIN
             
             OrgRoutingHandle: MARKA51-ARIN
             OrgRoutingName:   Eilken, Mark A
             OrgRoutingPhone:  +1-847-618-4834 
             OrgRoutingEmail:  meilken@nch.org
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/MARKA51-ARIN
             
             OrgDNSHandle: MARKA51-ARIN
             OrgDNSName:   Eilken, Mark A
             OrgDNSPhone:  +1-847-618-4834 
             OrgDNSEmail:  meilken@nch.org
             OrgDNSRef:    https://rdap.arin.net/registry/entity/MARKA51-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
             
             OrgNOCHandle: MARKA51-ARIN
             OrgNOCName:   Eilken, Mark A
             OrgNOCPhone:  +1-847-618-4834 
             OrgNOCEmail:  meilken@nch.org
             OrgNOCRef:    https://rdap.arin.net/registry/entity/MARKA51-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.
             #