Data as of Nov 8, 2026
12.164.66.0/24
No anonymizer space · no proxy exits in 30 daysFiserv Solutions, LLC · 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) | 5,281 293 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,375 726 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@ |
| └ 12.164.66.0/24 | 256 | ATT-NET-12-164-66-0 | Fiserv Solutions, LLC (FSL-293) · US | Reassigned | Jun 7, 2025 | ESMSustainingEng@ |
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
AS11273
US
- Name
- Fiserv Solutions, LLC
- Type
- Business
- Registered
- Jun 8, 1998
- Domain
- fiserv.com
- Industry
- Software Development
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Rotating
- First seen
- Jan 2006
- Current origin since
- Jun 2023 · 3.4 yr
- Origin networks
- 3
- Last change of origin
- Jun 2023
Recorded history
History
- Handoffs
- 2
Whois
Registration for this announcement
- Range
- 12.
164. 66. 0/ 24 - Netname
- ATT-NET-12-164-66-0
- Registrant
- Fiserv Solutions, LLC
- Organization
- Fiserv Solutions, LLC (FSL-293)
- Org address
- 255 Fiserv Drive, Brookfield, WI, 53045
- Org country
- US
- Type
- Reassigned
- Handle
- NET-12-164-66-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Jun 7, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 23, 1983
- Status
- assigned
Report abuse
Abuse contact
- ESMSustainingEng@
Fiserv. com - Name
- NOC
- Phone
- +1-678-375-4000
- Handle
- NOC32256-ARIN