Data as of Nov 5, 2026
12.28.196.0/24
No anonymizer space · no proxy exits in 30 daysConcurrent Technologies Corp. · 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 | 8,094 440 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@ |
| └ 12.28.196.0/24 | 256 | CONCURRE77-196 | Concurrent Technologies (C10676965) · US | Reassigned | Feb 1, 2024 | 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
AS19449
US
- Name
- Concurrent Technologies Corp.
- Type
- Business
- Registered
- Jan 8, 2001
- Domain
- ctc.com
- Industry
- Community Groups and Nonprofits
- 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
- May 2005 · 21 yr
- Origin networks
- 1
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS19449 | RADB | Proxy route object for CONCURRENT TECHNOLOGIES | MAINT-AS63125 | Oct 5, 2026 |
Whois
Registration for this announcement
- Range
- 12.
28. 196. 0/ 24 - Netname
- CONCURRE77-196
- Registrant
- Concurrent Technologies
- Organization
- Concurrent Technologies (C10676965)
- Type
- Reassigned
- Handle
- NET-12-28-196-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Feb 1, 2024
- 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