AS5721 — NDU-NET

AS5721 announces 1 IPv4 prefixes covering 512 addresses and 0 IPv6 prefixes.

About this network

The network of the National Defense University, the US Department of Defense's joint professional military education institution in Washington, DC, under the handle NDU-NET.

What it's used for

• Connectivity for a DoD university that educates senior military officers and civilian officials, spanning its constituent colleges and research centres.
• Originates two /24s out of 216.21.18.0/23 — a compact footprint for a single campus.

Notable

• A government and military address space, but an academic one: this is a degree- granting institution under DoD, not an operational or tactical network.
• ARIN records date the organisation to 1994 and the AS number to 1995, so unlike many low numbers in this range it is an original assignment, not a modern reissue.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 216.21.18.0/23

Upstream networks

• AS33657 Comcast Cable Communications, LLC
• AS22773 Cox Communications Inc.

Adjacent networks

• AS33657 Comcast Cable Communications, LLC
• AS22773 Cox Communications Inc.

Routing security

• RPKI: 0 valid, 0 invalid and 2 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 0 route objects.