Data as of Nov 10, 2026
12.39.144.0/23
No anonymizer space · no proxy exits in 30 daysAbacus Data Systems, Inc. · 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 | 8,073 434 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,384 731 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@ |
| └ 12.39.144.0/23 | 512 | SWITCH224-144 | SWITCH (SWITC-26) · US | Reassigned | Jun 18, 2016 | — |
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
AS394976
US
- Name
- Abacus Data Systems, Inc.
- Type
- Hosting
- Registered
- Mar 8, 2016
- Domain
- abacusnext.com
- Industry
- Media, Publishing, and Broadcasting
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2005
- Current origin since
- Jan 2018 · 8.9 yr
- Origin networks
- 2
- Last change of origin
- Jan 2018
Recorded history
History
- Handoffs
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS394976 | RADB | Switch Communications Customer Route | MAINT-SWITCH | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 12.
39. 144. 0/ 23 - Netname
- SWITCH224-144
- Registrant
- SWITCH
- Organization
- SWITCH (SWITC-26)
- Org address
- 7135 S DECATUR BLVD, LAS VEGAS, NV, 89118
- Org country
- US
- Type
- Reassigned
- Handle
- NET-12-39-144-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Jun 18, 2016
- 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