Data as of Nov 10, 2026
166.187.0.0/16
No anonymizer space · no proxy exits in 30 daysAT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 166.184.0.0/13 since Aug 2026 | AS7018 | Residential | 3 | AT&T Enterprises, LLC |
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 166.187.0.0/18 since May 2009 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.187.64.0/18 since May 2009 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.187.128.0/18 since May 2009 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.187.192.0/18 since May 2009 | AS20057 | Mobile | AT&T Enterprises, LLC |
Network & registry
Origin network
AS20057
US
- Name
- AT&T Enterprises, LLC
- Type
- Internet provider
- Registered
- Mar 20, 2001
- Domain
- att.com
- Industry
- Internet Service Provider (ISP)
- 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 2009 · 18 yr
- Origin networks
- 2
- Last change of origin
- May 2009
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 166.187.0.0/16 | AS20057 | /24 | ARIN | RPKI valid |
| 166.184.0.0/13 | AS7018 | /13 | ARIN | Another network |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS20057 | ARIN | AT&T Enterprises, LLC | MNT-AEL-360 | Sep 1, 2026 |
Whois
Registration for this announcement
- Range
- 166.
183. 0. 0 - 166. 209. 255. 255 - Netname
- AEL-360
- Registrant
- AT&T Enterprises, LLC
- Organization
- AT&T Enterprises, LLC (AEL-360)
- Org address
- 208 S. Akard St., Dallas, TX, 75202
- Org country
- US
- Type
- Direct Allocation
- Handle
- NET-166-183-0-0-1
- Parent
- NET-166-0-0-0-0
- Created
- Apr 1, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Apr 1, 2025
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN