Data as of Nov 3, 2026
166.136.0.0/16
No anonymizer space · no proxy exits in 30 daysAT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 166.136.0.0/15 since Aug 2026 | AS7018 | Residential | 230 1 always on | AT&T Enterprises, LLC |
Nesting
More-specifics by size
Sized by addresses, colored by each announcement's type. Click a tile with children to zoom in, a leaf to open it.
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 166.136.112.0/22 since Apr 2015 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.136.150.0/23 since Jun 2020 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.136.162.0/24 since Mar 2019 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.136.164.0/22 since Mar 2019 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.136.170.0/23 since Jul 2019 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.136.173.0/24 since Nov 2019 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.136.174.0/23 since Nov 2019 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.136.176.0/24 since Oct 2018 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.136.192.0/22 since Aug 2014 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.136.212.0/22 since Dec 2017 | 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
- Dec 2005
- Current origin since
- Feb 2008 · 19 yr
- Origin networks
- 2
- Last change of origin
- Feb 2008
Recorded history
History
- Handoffs
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 166.136.0.0/16 | AS20057 | /24 | ARIN | RPKI valid |
| 166.136.0.0/15 | AS7018 | /15 | 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
- 166.128.0.0 - 166.138.255.255
- 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-166-128-0-0-1
- 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
- [email protected]
- Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN