AS21633 — DOI-NBC-NET

AS21633 announces 4 IPv4 prefixes covering 2,816 addresses and 0 IPv6 prefixes.

About this network

The AS handle DOI-NBC-NET is operated by the U.S. Department of the Interior.

What it's used for

• The address space carries internal government infrastructure, evidenced by netnames such as US-DEPARTMENT-OF-THE-INTERIOR, UDI-1-Z, and AMD-GOV.
• The AS announces 2816 IPv4 addresses across 4 prefixes with only 2 observed neighbours, indicating a small, self-contained internal network rather than a transit or access provider.

Notable

• All registrants for the announced prefixes are listed as the U.S. Department of the Interior, consistent with the AS holder.
• The address inventory consists of four distinct IPv4 blocks, including a /21 and three /24s, with no IPv6 prefixes in the inventory.

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

Announced prefixes

• 137.227.192.0/21
• 199.5.233.0/24
• 205.173.0.0/24
• 205.173.4.0/24

Upstream networks

• AS22284 U.S. Department of the Interior
• AS3549 Level 3 Parent, LLC

Adjacent networks

• AS22284 U.S. Department of the Interior
• AS3549 Level 3 Parent, LLC