Autonomous system
AS4354 PRM-078
Unclassified ARIN
Summary
Universal Health Services
enterprise legacy
This AS number is registered to Universal Health Services, Inc. (UHS), the Fortune 500 hospital and behavioural-health operator headquartered in King of Prussia, Pennsylvania. ARIN registered the number to UHS at the end of 2024, so this is a modern reassignment — the low number carries no early-internet pedigree.
What it's used for
- Corporate network capacity for a large healthcare provider. UHS operates, through its subsidiaries, hundreds of acute-care hospitals, behavioural-health facilities, freestanding emergency departments and ambulatory centres across the US and the UK.
Notable
- An enterprise network rather than a service provider — the addresses serve one organisation's own sites and systems.
- The footprint is a single /24, carved out of carrier-assigned space, which is a typical shape for an enterprise that multihomes a small block under its own AS rather than running a large routed estate.
- Healthcare networks of this kind carry clinical and administrative systems subject to strict regulatory handling, so the address space is corporate infrastructure and not consumer traffic.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Address space
Summary
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS4354- Registry name
- ERM-026
- Registrant
- UNIVERSAL HEALTH SERVICES
- Abuse contact
- christina.abbascia@uhsinc.com
- Registered
- 2024-12-03
- Last changed
- 2025-08-19
- Status
- active
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
No IC3 indicators Nothing from the FBI IC3 feed.
Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere