Data as of Nov 4, 2026
12.48.4.0/24
No anonymizer space · no proxy exits in 30 daysTexas Health Resources · 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 | 8,124 441 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,297 724 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 | abuse@ |
| └ 12.48.4.0/24 | 256 | TEXAS-HE931-4 | Texas Health Resources (THR-4) · US | Reassigned | Mar 22, 2013 | — |
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
AS26975
US
- Name
- Texas Health Resources
- Type
- Business
- Registered
- Jan 7, 2003
- Domain
- texashealth.org
- Industry
- Health Care Services
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Mar 2007
- Current origin since
- Jan 2020 · 6.8 yr
- Origin networks
- 3
- Last change of origin
- Jan 2020
Recorded history
History
- Handoffs
- 2
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS31903 not the origin | RADB | RR-RC-Texas Health Partners LLC-North Texas | MAINT-RR | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 12.
48. 4. 0/ 24 - Netname
- TEXAS-HE931-4
- Registrant
- Texas Health Resources
- Organization
- Texas Health Resources (THR-4)
- Org address
- 612 East Lamar, Arlington, TX, 76011
- Org country
- US
- Type
- Reassigned
- Handle
- NET-12-48-4-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Mar 22, 2013
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 23, 1983
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN