Data as of Nov 11, 2026
155.166.72.0/21
No anonymizer space · no proxy exits in 30 daysAT&T Enterprises, LLC
Announcement
this exact prefix
RPKI valid
Announced by
Type
Mobile
Risk
10 / 100 · Low
Shared address
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 155.166.0.0/17 since Nov 2010 | AS20057 | Mobile | 1 | AT&T Enterprises, LLC | |
| 155.166.0.0/16 since Aug 2026 | AS7018 | Mobile | 1 | 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
- Jan 2019
- Current origin since
- Jan 2019 · 7.8 yr
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 155.166.72.0/21 | AS20057 | /21 | ARIN | RPKI valid |
| 155.166.0.0/17 | AS20057 | /17 | ARIN | Too specific |
| 155.166.0.0/16 | AS7018 | /16 | 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 15, 2026 |
Whois
Registration for this announcement
- Range
- 155.
166. 0. 0/ 16 - Netname
- ATT-MOBILITY-LLC-155-166-0-0
- 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-155-166-0-0-1
- Parent
- NET-155-0-0-0-0
- Created
- Mar 24, 1992
- RIR
- ARIN
- Country
- US
- Delegated
- Mar 24, 1992
- Status
- assigned
Report abuse
Abuse contact
- abuse@
att. net - Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN