AS14373 — UTMB

AS14373 announces 1 IPv4 prefixes covering 65,536 addresses and 0 IPv6 prefixes.

About this network

The registry files this network under the name of the city rather than the institution, and every address that answers is a router.

What it's used for

• A medical school and teaching hospital's network. 65,536 addresses across 28 IPv4 prefixes, with two observed BGP neighbours and no IPv6 announced.

Notable

• Every record checked carries the netname UTGALVESTON, registered to University of Texas Medical Branch.
• All 28 prefixes sit inside 129.109, from a /18 down to several /24s.
• Six of eighteen sampled addresses returned a name, all of the form utmb-129-109-111-254.utmb.edu.
• Every one of those six ends in .254.
• The registry lookup for 129.109.152.0/21 failed.

Interesting

• A university system with campuses in several cities distinguishes its blocks by place, so the netname says where rather than who. It is the only field in the record that carries information the registrant string does not.
• The addresses that answer are all the last usable address in their block, which is where routers sit. Interior addresses stay unnamed while the equipment at the edge of each subnet is labelled, because the labels exist for the people running the network rather than for anyone outside it.
• The hostname repeats the address it belongs to, prefixed by the institution. It carries no building, no ward and no service, which for a hospital network is a decision as much as a default.
• Twenty-eight pieces of one range is a campus subdivided by clinic, lab and teaching site.

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

Announced prefixes

• 129.109.0.0/16

Upstream networks

• AS6922 Texas Department of Information Resources
• AS7018 AT&T Enterprises, LLC

Adjacent networks

• AS6922 Texas Department of Information Resources
• AS7018 AT&T Enterprises, LLC

Routing security

• RPKI: 0 valid, 0 invalid and 15 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 7% of announcements registered; 1 route objects.
• Listed in as-sets: AS-6922, AS-COMCAST-EDIA, AS-LEARN-6922, AS-LEARN-INST, AS-TXBB-COMMODITY.