asn.dev

Autonomous system

AS46511 MMC-026 - UNIVERSAL HEALTH SERVICES

Unclassified ARIN

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Universal Health Services

United States of America · AI-generated

healthcare business enterprise

AS46511 is operated by Universal Health Services.

What it's used for

  • The address space carries internal corporate infrastructure, evidenced by the netname SBC066138250000020905 and registrant McAllen Medical Center.
  • The AS announces 256 IPv4 addresses across 1 prefix with 2 observed neighbours, indicating a small, self-contained enterprise network rather than a transit or access provider.
  • Traffic from this AS consists of internal hospital and healthcare facility communications, including clinical systems and administrative endpoints for Universal Health Services' owned and operated facilities.

Notable

  • The registrant McAllen Medical Center aligns with the announcer, as McAllen Medical Center is a facility operated by Universal Health Services.
  • The address inventory consists of a single /24 block (66.138.250.0/24) with reverse DNS entries pointing to ded.swbell.net, reflecting legacy AT&T/SBC infrastructure used for dedicated enterprise connectivity.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS11427Charter Communications Inc49
AS2386AT&T Enterprises, LLC14

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-01, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
USUnited States of America1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS46511
Registry name
MMC-026
Registrant
UNIVERSAL HEALTH SERVICES
Abuse contact
christina.abbascia@uhsinc.com
Registered
2025-11-05
Last changed
2025-11-05
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS46511
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS46511

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: 449 networks and 1,846 prefixes, as published 2026-11-02. 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

Cross-check