AS16643 — VCU-ASN1

AS16643 announces 1 IPv4 prefixes covering 65,536 addresses and 0 IPv6 prefixes.

About this network

Sixty-five thousand globally routed addresses, under a netname calling them a local network.

What it's used for

• A university's network. One IPv4 prefix announced from the United States, no IPv6, sixty-five thousand five hundred and thirty-six addresses, through two observed BGP neighbours.

Notable

• The AS handle is the university's three initials, the three letters for an autonomous system number, and the numeral one.
• The single block is registered to the university under a netname of those same initials and the three letters for a local area network.
• One block holds the entire announcement, which is unusual at this size and typical of an institution allocated its space in a single grant.
• Three addresses were queried for reverse DNS and none returned a name.
• Two observed neighbours carry the whole campus.

Interesting

• Calling globally routed space a local network is a habit from a time when a campus block was exactly that. The campus was the network, and everything outside it was somebody else's problem.
• A counter of one on the handle of a university's only AS number is optimism about a second that never arrived, or simply the shape of a template.
• Sixty-five thousand addresses answering nothing means the naming is entirely internal. From outside, this is a large well-defined block with no visible structure at all.

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

Announced prefixes

• 128.172.0.0/16

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS40220 Virginia Polytechnic Institute and State Univ.

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS40220 Virginia Polytechnic Institute and State Univ.