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	Prefix	Description
	216.21.18.0/24	National Defense University
	216.21.19.0/24	National Defense University

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS33657	Comcast Cable Communications, LLC	✔	✘
	AS22773	Cox Communications Inc.	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS22773	Cox Communications Inc.	✔	✘
	AS33657	Comcast Cable Communications, LLC	✔	✘

ASHandle:       AS5721
OrgID:          NDU-1
ASName:         NDU-NET
ASNumber:       5721
RegDate:        1995-09-06
Comment:        http://www.ndu.edu
Updated:        2015-05-07
TechHandle:     CJH19-ARIN
AbuseHandle:    CJH19-ARIN
NOCHandle:      CJH19-ARIN
Source:         ARIN



OrgID:          NDU-1
OrgName:        National Defense University
CanAllocate:    
Street:         Ft. McNair, Bldg. 62
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20319-6000
RegDate:        1994-10-04
Updated:        2015-05-07
OrgAdminHandle: CJH19-ARIN
OrgTechHandle:  CJH19-ARIN
OrgAbuseHandle: CJH19-ARIN
Source:         ARIN





OrgAdminHandle:       CJH19-ARIN
OrgAdminName:         christopher hartley
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        CJH19-ARIN
OrgTechName:          christopher hartley
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       CJH19-ARIN
OrgAbuseName:         christopher hartley
# Email removed, Log into bgp.tools to see whois emails


TechHandle:           CJH19-ARIN
TechName:             christopher hartley
# Email removed, Log into bgp.tools to see whois emails


AbuseHandle:          CJH19-ARIN
AbuseName:            christopher hartley
# Email removed, Log into bgp.tools to see whois emails


NOCHandle:            CJH19-ARIN
NOCName:              christopher hartley
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2025-12-26T03:37:39Z UTC

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Member of the following AS-SETs

-	Member	ASN Count