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	Prefix	Description
	38.68.63.0/24	US Oncology
	206.203.80.0/24	McKesson Corp.

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✘
	AS3356	Lumen (Level 3)	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✘
	AS3356	Lumen (Level 3)	✔	✘
	AS1239	Sprint Wireline (Cogent)	✔	✘

ASHandle:       AS27451
OrgID:          USONC
ASName:         USO-ASN
ASNumber:       27451
RegDate:        2003-03-10
Updated:        2012-03-02
Source:         ARIN



OrgID:          USONC
OrgName:        US Oncology, Inc.
CanAllocate:    
Street:         10101 Woodloch Forest
City:           The Woodlands
State/Prov:     TX
Country:        US
PostalCode:     77380
Comment:        US Oncology Inc is a subsidiary of McKesson.
RegDate:        2003-02-25
Updated:        2023-03-22
OrgAdminHandle: NIT2-ARIN
OrgTechHandle:  NIT2-ARIN
OrgAbuseHandle: NIT2-ARIN
Source:         ARIN





OrgAdminHandle:       NIT2-ARIN
OrgAdminName:          Network Infrastructure Team
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        NIT2-ARIN
OrgTechName:           Network Infrastructure Team
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       NIT2-ARIN
OrgAbuseName:          Network Infrastructure Team
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2025-12-24T03:28:07Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
LEVEL3	as-lumen-customers-asns	10695
LEVEL3	as-as209-cust	1818