Autonomous system
AS14373 UTMB
Unclassified ARIN
Summary
University of Texas Medical Branch
research education infrastructure
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 toUniversity of Texas Medical Branch. - All 28 prefixes sit inside
129.109, from a/18down 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
129.109.152.0/21failed.
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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-20, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 32 prefixes · 63.74K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 32 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS14373- Registry name
- UTMB
- Registrant
- University of Texas Medical Branch
- Abuse contact
- bgrimm@utmb.edu
- Registered
- 1999-12-03
- Last changed
- 2012-03-20
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 8 with no ROA
- ROAs
- 0 authorising AS14373
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 1 naming AS14373
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,778 prefixes, as published 2026-10-20. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere