Data as of Nov 4, 2026
166.218.0.0/15
No anonymizer spaceAT&T Enterprises, LLC
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 166.216.0.0/14 since Aug 2026 | AS7018 | Residential | 300 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 |
|---|---|---|---|---|
| 166.218.0.0/16 since Jan 2006 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.0.0/17 since Feb 2007 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.24.0/23 since Oct 2016 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.48.0/21 since Dec 2017 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.128.0/17 since Feb 2007 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.236.0/24 since Oct 2016 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.237.0/24 since Oct 2016 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.238.0/24 since Oct 2016 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.239.0/24 since Oct 2016 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.240.0/24 since Oct 2016 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.241.0/24 since Jan 2022 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.242.0/24 since Feb 2017 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.243.0/24 since Sep 2016 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.246.0/23 since Oct 2016 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.248.0/23 since Feb 2017 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.250.0/23 since Feb 2017 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.252.0/24 since Mar 2022 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.218.253.0/24 since Mar 2022 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.0.0/16 since Nov 2006 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.8.0/23 since May 2015 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.18.0/23 since May 2015 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.42.0/24 since Feb 2018 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.47.0/24 since Sep 2017 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.48.0/22 since May 2015 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.56.0/23 since Sep 2017 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.59.0/24 since Apr 2018 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.128.0/20 since Jul 2020 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.168.0/21 since May 2015 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.219.184.0/22 since May 2015 | 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 2022
- Current origin since
- May 2022 · 4.4 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 166.218.0.0/15 | AS20057 | /24 | ARIN | RPKI valid |
| 166.216.0.0/14 | AS7018 | /14 | 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.
212. 0. 0 - 166. 220. 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-166-212-0-0-1
- 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