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Data as of Nov 5, 2026

66.138.250.0/24

No anonymizer space · no proxy exits in 30 days

Universal Health Services · space held by AT&T Enterprises, LLC

Announcement
this exact prefix
No RPKI
Announced by
AS46511
Type
Unknown
Risk
0 / 100 · Low
Recent change
New origin May 2026
its first announcement on record

Announcements

Less specific

Covering announcements

PrefixOriginTypeProxy exitsHolderRPKI
66.136.0.0/13
since Oct 2013
AS7018Residential2,532
63 always on
AT&T Enterprises, LLC

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
66.136.0.0/13524,288SBCIS-SIS80AT&T Enterprises, LLC (AEL-360) · USDirect AllocationJun 5, 2001abuse@att.net
└ 66.138.250.0/24256SBC066138250000020905McAllen Medical Center (C00368109) · USReassignedSep 5, 2002abuse@att.net
via SBCIS-SIS80

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
IPv4 market

Holder

Holder in the market →
Organization
AT&T Enterprises, LLC
Handle
AEL-360
Range
66.136.0.0/13
Registration type
Direct Allocation
Record created
Jun 5, 2001
Origin network

AS46511

US
Name
Universal Health Services
Type
Business
Registered
Nov 5, 2025
Domain
universal-health.com
Industry
Health Care Services
Spamhaus ASN-DROP
not listed