Data as of Nov 14, 2026
166.208.0.0/15
No anonymizer spaceAT&T Enterprises, LLC
Announcement
this exact prefix
RPKI valid
Announced by
Type
Mobile
51% of it
Recent change
New origin Aug 2026
its first announcement on record
Announcements
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 166.209.0.0/18 since Nov 2024 | AS7018 | Residential | AT&T Enterprises, LLC | |
| 166.209.76.0/22 since Aug 2018 | AS7287 | Mobile | AT&T Enterprises, LLC | |
| 166.209.88.0/24 since Jul 2018 | AS7287 | Mobile | AT&T Enterprises, LLC | |
| 166.209.89.0/24 since May 2017 | AS7287 | Mobile | AT&T Enterprises, LLC | |
| 166.209.110.0/24 since Nov 2017 | AS7287 | Mobile | AT&T Enterprises, LLC |
Composition
The types across the prefix's announced space, by addresses.
Announced space
Address share
Announced space
Types across the prefix
131,072 addresses
| Type | Addresses | Share | Ranges | |
|---|---|---|---|---|
| Mobile | 67,328 | 51% | 260 | |
| Residential | 63,744 | 49% | 5 |
Network & registry
Origin network
AS7018
US
- Name
- AT&T Enterprises, LLC
- Type
- Internet provider
- Registered
- Jul 30, 1996
- Domain
- att.com
- Website
- www.att.com
- Industry
- Internet Service Provider (ISP)
- Spamhaus ASN-DROP
- not listed
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Aug 2026
- Current origin since
- Aug 2026 · 3 mo
- Origin networks
- 1
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