Data as of Nov 5, 2026
166.212.0.0/14
No anonymizer spaceAT&T Enterprises, LLC
Announcement
this exact prefix
RPKI valid
Announced by
Type
Mobile
Recent change
New origin Aug 2026
its first announcement on record
Announcements
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 |
|---|---|---|---|---|
| 166.212.0.0/15 since Dec 2023 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.212.0.0/16 since Nov 2019 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.213.0.0/16 since May 2005 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.213.6.0/24 since May 2015 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.213.126.0/24 since Apr 2018 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.213.158.0/24 since May 2015 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.213.163.0/24 since May 2015 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.214.0.0/16 since Dec 2025 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.0.0/16 since May 2005 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.0.0/17 since May 2005 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.52.0/22 since Dec 2017 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.56.0/24 since Dec 2017 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.128.0/17 since May 2005 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.152.0/24 since Aug 2015 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.168.0/23 since Jul 2019 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.172.0/23 since May 2019 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.200.0/21 since Dec 2017 | AS20057 | Mobile | AT&T Enterprises, LLC | |
| 166.215.212.0/23 since May 2019 | AS20057 | Mobile | AT&T Enterprises, LLC |
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 · 2 mo
- Origin networks
- 1
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