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	Prefix	Description
	129.112.0.0/16	University of Texas Southwestern Medical Center
	129.112.109.0/24	University of Texas Southwestern Medical Center
	129.112.115.0/24	University of Texas Southwestern Medical Center
	198.215.36.0/22	University of Texas Southwestern Medical Center
	198.215.48.0/20	UT Southwestern / Maternal Health and Family Planning
	198.215.96.0/20	UT Southwestern Medical Center at Dallas
	198.215.176.0/20	Zale Lipshy University Hospital
	198.241.16.0/20	University of Texas Southwestern Medical Center
	199.165.152.0/23	University of Texas Southwestern Medical Center
	199.165.154.0/24	University of Texas Southwestern Medical Center
	199.242.234.0/23	University of Texas Southwestern Medical Center
	199.242.236.0/22	University of Texas Southwestern Medical Center
	199.249.214.0/24	University of Texas Southwestern Medical Center
	2620:0:840::/48	University of Texas Southwestern Medical Center

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS6922	Texas Department of Information Resources	✔	✔
	AS7018	AT&T Enterprises, LLC	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS6922	Texas Department of Information Resources	✔	✔
	AS276	University of Texas System	✔	✔
	AS7018	AT&T Enterprises, LLC	✔	✘

ASHandle:       AS13998
OrgID:          USMCAD
ASName:         SWMED
ASNumber:       13998
RegDate:        1999-10-01
Updated:        2013-01-29
Source:         ARIN



OrgID:          USMCAD
OrgName:        University of Texas Southwestern Medical Center
CanAllocate:    
Street:         5323 Harry Hines
City:           Dallas
State/Prov:     TX
Country:        US
PostalCode:     75235-8595
RegDate:        1994-06-14
Updated:        2024-09-09
OrgAdminHandle: USMC-ARIN
OrgTechHandle:  USMC-ARIN
OrgAbuseHandle: USMC-ARIN
Source:         ARIN





OrgAdminHandle:       USMC-ARIN
OrgAdminName:          UT Southwestern Medical Center
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        USMC-ARIN
OrgTechName:           UT Southwestern Medical Center
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       USMC-ARIN
OrgAbuseName:          UT Southwestern Medical Center
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-02-17T03:25:15Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as-hurricanev6	20533
RADB	as-learn-6922	28
LEVEL3	as-level3-origins-na	0
RADB	as-6922	152
RADB	as-txbb-commodity	151
RADB	as-learn-inst	114
RADB	as-biznet	684