AS16519 — CUDENVER

AS16519 announces 2 IPv4 prefixes covering 131,072 addresses and 1 IPv6 prefixes.

About this network

Two blocks, two campuses, and the netnames are the only place the second campus is named.

What it's used for

• A university's network. Three prefixes announced from the United States, one of them IPv6, one hundred and thirty-one thousand and seventy-two addresses, through two observed BGP neighbours.

Notable

• Both IPv4 blocks are at the largest prefix size in common use, and both are registered to the same university under its city name.
• The netnames differ. One is two letters for the university system and the city, matching the AS handle exactly. The other is those same two letters and a different campus name entirely.
• That second campus appears nowhere else in the record. The registrant field on both blocks is identical, so only the netname distinguishes them.
• The two blocks come from unrelated parent ranges, one of them allocated long after the other.
• Six addresses were queried for reverse DNS and none returned a name.

Interesting

• A university with a medical campus usually ends up with two networks and one legal entity. Here the split is recorded in the one field nobody validates, which makes the netname the most informative thing in the record.
• Two allocations at the largest common size, for one institution, is what arriving early looked like. The second block came later and at the same size, which is unusual: by then, allocations this large were hard to justify.
• Nothing published in reverse DNS across a hundred and thirty thousand addresses is the campus norm. The names exist inside; the outside gets numbers.

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

Announced prefixes

• 132.194.0.0/16
• 140.226.0.0/16
• 2620:123:5000::/40

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS14041 University Corporation for Atmospheric Research

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS14041 University Corporation for Atmospheric Research