Data as of Nov 5, 2026
12.139.63.0/24
No anonymizer space · no proxy exits in 30 daysU.S. Renal Care, Inc. · space held by AT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Leased from | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|---|
| 12.128.0.0/9 | AS7018 | Residential | IP broker Rackdog (part) | 5,205 282 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,299 722 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@ |
| └ 12.139.0.0/16 | 65,536 | ATTWORLD26 | AT&T Services, Inc. (ATTW) · US | Reallocated | May 21, 2010 | — |
| └ 12.139.63.0/24 | 256 | US-RENAL52-63 | U.S. Renal Care (C08067302) · US | Reassigned | Oct 15, 2021 | — |
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
- Reallocated to
- AT&T Services, Inc. (ATTW)
- Reallocated range
- 12.
139. 0. 0/ 16 - Reallocated
- May 21, 2010
Origin network
AS63248
US
- Name
- U.S. Renal Care, Inc.
- Type
- Business
- Registered
- Sep 10, 2024
- Domain
- usrenalcare.com
- Industry
- Health Care Services
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Reactivated
- First seen
- Jun 2018
- Current origin since
- Aug 2023 · 3.2 yr
- Origin networks
- 3
- Last change of origin
- Aug 2023
Recorded history
History
- Handoffs
- 2
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS63248 | RADB | SCTASK1130873 | MAINT-FLEXENTIAL | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 12.
139. 63. 0/ 24 - Netname
- US-RENAL52-63
- Registrant
- U.S. Renal Care
- Organization
- U.S. Renal Care (C08067302)
- Type
- Reassigned
- Handle
- NET-12-139-63-0-1
- Parent
- NET-12-139-0-0-1
- Created
- Oct 15, 2021
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 23, 1983
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- ATT Abuse
- Phone
- +1-999-999-9999
- Handle
- ATTAB-ARIN