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	Prefix	Description
	147.241.48.0/21	Headquarters, USAISC
	147.241.64.0/21	Headquarters, USAISC
	147.241.136.0/21	Headquarters, USAISC
	147.241.144.0/21	Headquarters, USAISC
	2001:480:253::/48	High Performance Computing

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS668	DoD High Performance Computing (Defense Research and Engineering Network)	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS668	DoD High Performance Computing (Defense Research and Engineering Network)	✔	✔

ASHandle:       AS228
OrgID:          USDDD
ASName:         DNIC-AS-00228
ASNumber:       228
RegDate:        1988-09-08
Updated:        2025-09-12
Source:         ARIN



OrgID:          USDDD
OrgName:        United States Department of Defense (DoD)
CanAllocate:    
Street:         3990 E. Broad Street
City:           Columbus
State/Prov:     OH
Country:        US
PostalCode:     43218
RegDate:        2007-01-12
Updated:        2025-03-13
OrgAdminHandle: REGIS10-ARIN
OrgTechHandle:  MIL-HSTMST-ARIN
OrgTechHandle:  REGIS10-ARIN
OrgAbuseHandle: MIL-HSTMST-ARIN
OrgNOCHandle:   MIL-HSTMST-ARIN
Source:         ARIN





OrgAdminHandle:       REGIS10-ARIN
OrgAdminName:          Registration
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        MIL-HSTMST-ARIN
OrgTechName:           Network DoD
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        REGIS10-ARIN
OrgTechName:           Registration
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       MIL-HSTMST-ARIN
OrgAbuseName:          Network DoD
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         MIL-HSTMST-ARIN
OrgNOCName:            Network DoD
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-02-15T03:30:21Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-transroute-spec	19660
RIPE	as20965:as-from-internet2-to-geant	2967
RADB	as-dren	30
RADB	as-hurricanev6	20532
RADB	as-hurricane	24522
RADB	as668:as-transit	28