Report for 21666

Name

OSF-ASN-01 - OSF Healthcare 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.

21666 OSF-ASN-01 - OSF Healthcare System, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS6461          ZAYO-6461 - Zayo Bandwidth, US
    AS174           COGENT-174 - Cogent Communications, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
35174 AS21666        ORIGIN  Originate:       1024 /22.00  Transit:          0 /0.00  OSF-ASN-01 - OSF Healthcare 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       %
35841 AS21666       OSF-ASN-01 - OSF Healthcare System, US             4      0      0      4      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  38.65.207.0/24       4777 2516 174 21666    
  38.131.231.0/24      4777 2516 174 21666    
  198.246.176.0/24     4777 2516 174 21666    
  204.238.189.0/24     4777 2497 6461 21666   

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

AS21666   2 More Specifics   4 Total Advertisements   OSF-ASN-01 - OSF Healthcare System, US
    38.65.207.0/24                38.0.0.0/8
    38.131.231.0/24               38.0.0.0/8

Whois Entry

whois: 402609

IANA has recorded AS21666 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21666\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:       21666
             ASName:         OSF-ASN-01
             ASHandle:       AS21666
             RegDate:        2022-08-30
             Updated:        2022-08-30
             Ref:            https://rdap.arin.net/registry/autnum/21666
             
             
             OrgName:        OSF Healthcare System
             OrgId:          OHS-2
             Address:        124 SW Adams St
             City:           Peoria
             StateProv:      IL
             PostalCode:     61602
             Country:        US
             RegDate:        1995-05-26
             Updated:        2022-12-09
             Ref:            https://rdap.arin.net/registry/entity/OHS-2
             
             
             OrgAbuseHandle: NETWO5372-ARIN
             OrgAbuseName:   Network Administration
             OrgAbusePhone:  +1-309-655-2000 
             OrgAbuseEmail:  dnsadmin@osfhealthcare.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO5372-ARIN
             
             OrgTechHandle: NETWO5372-ARIN
             OrgTechName:   Network Administration
             OrgTechPhone:  +1-309-655-2000 
             OrgTechEmail:  dnsadmin@osfhealthcare.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO5372-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.
             #