Data as of Nov 7, 2026
12.40.206.0/24
No anonymizer space · no proxy exits in 30 daysMacomb County, Michigan · 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 | 8,064 434 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,307 719 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@ |
| └ 12.40.206.0/24 | 256 | ATT-NET-12-40-206-0 | Macomb County, Michigan (MCM-88) · US | Reassigned | Mar 10, 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
AS63144
US
- Name
- Macomb County, Michigan
- Type
- Business
- Registered
- Aug 12, 2014
- Industry
- Government and Regulatory Agencies, Administrations, Departments, and Services
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- May 2016
- Current origin since
- May 2016 · 11 yr
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 12.
40. 206. 0/ 24 - Netname
- ATT-NET-12-40-206-0
- Registrant
- Macomb County, Michigan
- Organization
- Macomb County, Michigan (MCM-88)
- Org address
- 117 S. Groesbeck, Mount Clemens, MI, 48043
- Org country
- US
- Type
- Reassigned
- Handle
- NET-12-40-206-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Mar 10, 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