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	Prefix	Description
	156.40.93.0/24	U.S. Department of Health & Human Services
	156.40.94.0/24	U.S. Department of Health & Human Services
	156.40.95.0/24	U.S. Department of Health & Human Services
	156.40.197.0/24	U.S. Department of Health & Human Services
	158.71.224.0/24	U.S. Dept. of Health and Human Services
	158.73.0.0/16	U.S. Dept. of Health and Human Services
	158.73.196.0/24	U.S. Dept. of Health and Human Services
	158.74.38.0/24	U.S. Dept. of Health and Human Services
	198.179.3.0/24	U.S. Dept. of Health and Human Services
	198.179.4.0/24	U.S. Dept. of Health and Human Services
	2607:f220:10::/44	U.S. Dept. of Health and Human Services
	2607:f220:f1::/48	U.S. Dept. of Health and Human Services
	2607:f220:200::/44	Centers for Medicare & Medicaid Services

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS15029	U.S. Department of Health & Human Services	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS15029	U.S. Department of Health & Human Services	✔	✔
	AS70	National Library of Medicine	✔	✔
	AS26810	U.S. Dept. of Health and Human Services	✔	✔
	AS3527	National Institutes of Health	✔	✔
	AS5766	Indian Health Service	✔	✔
	AS30387	National Institutes of Health	✔	✘
	AS22828	United States Food and Drug Administration	✔	✔
	AS13611	U.S. Center For Disease Control and Prevention	✔	✘

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Downstreams

	ASN	Description	IPv4	IPv6
	AS26810	U.S. Dept. of Health and Human Services	✔	✔
	AS3527	National Institutes of Health	✔	✔
	AS5766	Indian Health Service	✔	✔
	AS30387	National Institutes of Health	✔	✘
	AS22828	United States Food and Drug Administration	✔	✔
	AS13611	U.S. Center For Disease Control and Prevention	✔	✘
	AS70	National Library of Medicine	✔	✔

ASHandle:       AS19050
OrgID:          UDHHS-4
ASName:         TIC-DHHS-INTERIOR
ASNumber:       19050
RegDate:        2012-10-03
Comment:        U.S. Department of Health and Human Services
Updated:        2012-10-03
Source:         ARIN



OrgID:          UDHHS-4
OrgName:        U.S. Department of Health & Human Services
CanAllocate:    
Street:         200 Independence Avenue, S.W.
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20201
RegDate:        2012-01-17
Updated:        2025-06-05
OrgAdminHandle: NIHAD-ARIN
OrgTechHandle:  NIHTE-ARIN
OrgAbuseHandle: NIHAD-ARIN
OrgNOCHandle:   NIHTE-ARIN
OrgRoutingHandle:   NIHTE-ARIN
OrgDNSHandle:   NIHAD-ARIN
Source:         ARIN





OrgAdminHandle:       NIHAD-ARIN
OrgAdminName:          NIHadm
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        NIHTE-ARIN
OrgTechName:           NIHtechs
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       NIHAD-ARIN
OrgAbuseName:          NIHadm
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         NIHTE-ARIN
OrgNOCName:            NIHtechs
# Email removed, Log into bgp.tools to see whois emails


OrgRoutingHandle:     NIHTE-ARIN
OrgRoutingName:        NIHtechs
# Email removed, Log into bgp.tools to see whois emails


OrgDNSHandle:         NIHAD-ARIN
OrgDNSName:            NIHadm
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2025-12-26T03:32:16Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
ARIN	as-udhhs-4	2
LEVEL3	as-lumen-customers-asns	10695
ARIN	as-nih-udhhs-4	2