Report for 27451

Name

USO-ASN - US Oncology, Inc., 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.

27451 USO-ASN - US Oncology, Inc., US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS174           COGENT-174 - Cogent Communications, LLC, US
    AS3356          LEVEL3 - Level 3 Parent, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
44725 AS27451        ORIGIN  Originate:        768 /22.42  Transit:          0 /0.00  USO-ASN - US Oncology, Inc., 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       %
37963 AS27451       USO-ASN - US Oncology, Inc., US                    3      0      0      3      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  38.68.63.0/24        4777 2516 174 27451    
  206.203.80.0/24      4777 2516 3356 27451   
  206.203.81.0/24      4777 2516 174 27451    

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

AS27451   3 More Specifics   3 Total Advertisements   USO-ASN - US Oncology, Inc., US
    38.68.63.0/24                 38.0.0.0/8
    206.203.80.0/24               206.203.64.0/18
    206.203.81.0/24               206.203.64.0/18

Whois Entry

whois: 402603

IANA has recorded AS27451 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS27451\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:       27451
             ASName:         USO-ASN
             ASHandle:       AS27451
             RegDate:        2003-03-10
             Updated:        2012-03-02
             Ref:            https://rdap.arin.net/registry/autnum/27451
             
             
             OrgName:        US Oncology, Inc.
             OrgId:          USONC
             Address:        10101 Woodloch Forest
             City:           The Woodlands
             StateProv:      TX
             PostalCode:     77380
             Country:        US
             RegDate:        2003-02-25
             Updated:        2023-03-22
             Comment:        US Oncology Inc is a subsidiary of McKesson.
             Ref:            https://rdap.arin.net/registry/entity/USONC
             
             
             OrgTechHandle: NIT2-ARIN
             OrgTechName:   Network Infrastructure Team
             OrgTechPhone:  +1-972-446-4800 
             OrgTechEmail:  NetworkInfrastructureTeam2@mckesson.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/NIT2-ARIN
             
             OrgAbuseHandle: NIT2-ARIN
             OrgAbuseName:   Network Infrastructure Team
             OrgAbusePhone:  +1-972-446-4800 
             OrgAbuseEmail:  NetworkInfrastructureTeam2@mckesson.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/NIT2-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.
             #