Data as of Nov 6, 2026
12.34.148.0/24
No anonymizer space · no proxy exits in 30 daysNNSA Office Of Secure Transportation · 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 | 8,020 433 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,222 713 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@ |
| └ 12.34.148.0/24 | 256 | DEPARTME33-148 | Department of Energy - Depart (C11486178) · US | Reassigned | Jan 24, 2026 | abuse@ via ATT |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
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
AS394819
US
- Name
- NNSA Office Of Secure Transportation
- Type
- Education
- Registered
- Jan 13, 2016
- Domain
- doe.gov
- Industry
- Utilities (Excluding Internet Service)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Feb 2016
- Current origin since
- Feb 2016 · 11 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 12.
34. 148. 0/ 24 - Netname
- DEPARTME33-148
- Registrant
- Department of Energy - Depart
- Organization
- Department of Energy - Depart (C11486178)
- Type
- Reassigned
- Handle
- NET-12-34-148-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Jan 24, 2026
- 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