Data as of Nov 3, 2026
12.3.40.0/24
No anonymizer space · no proxy exits in 30 daysUniversal Health Services · space held by AT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 12.0.0.0/9 | AS7018 | Residential | 8,095 437 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,255 715 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.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 12.0.0.0/8 | 16,777,216 | ATT | AT&T Enterprises, LLC (AEL-360) · US | Direct Allocation | Aug 23, 1983 | [email protected] |
| └ 12.3.40.0/24 | 256 | UHS-OF-D916-40 | UHS of Delaware Inc (UD-110) · US | Reassigned | Nov 28, 2018 | — |
Network & registry
IPv4 market
Holder
- Organization
- AT&T Enterprises, LLC
- Handle
- AEL-360
- Range
- 12.0.0.0/8
- Registration type
- Direct Allocation
- Record created
- Aug 23, 1983
- Legacy
- yes
Origin network
AS19826
US
- Name
- Universal Health Services
- Type
- Business
- Registered
- Dec 4, 2019
- Domain
- universal-health.com
- Industry
- Hospitals and Medical Centers
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Jul 2015
- Current origin since
- Feb 2020 · 6.7 yr
- Origin networks
- 2
- Last change of origin
- Feb 2020
Recorded history
History
- Handoffs
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS19826 | RADB | Comcast Cable Communications, Inc | MAINT-AS7922 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 12.3.40.0/24
- Netname
- UHS-OF-D916-40
- Registrant
- UHS of Delaware Inc
- Organization
- UHS of Delaware Inc (UD-110)
- Org address
- 367 S GULPH RD, KING OF PRUSSIA, PA, 19406
- Org country
- US
- Type
- Reassigned
- Handle
- NET-12-3-40-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Nov 28, 2018
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 23, 1983
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN