Data as of Nov 3, 2026
12.72.136.0/21
3 residential-proxy exits · 30 daysAT&T Enterprises, LLC
Residential-proxy exits
Proxy exits
3
0.15% of its addresses · 30 days
Always-on exits
1
33% of its exits
Spread
3 of 8
/24s with at least one exit
Providers
26
selling exits here
Oct 4, 2026 – Nov 2, 2026
Exits seen per day
3.3K observations
/24s with the most always-on exits
| /24 | Always-on exits | Proxy exits | |
|---|---|---|---|
| 12.72.140.0/24 | 1 | 1 | |
| 12.72.137.0/24 | 0 | 1 | |
| 12.72.141.0/24 | 0 | 1 |
Proxy providers listing exits
- Ake.net
- BirdProxies
- ByteProxies
- Byteful
- CatProxies
- ColaProxy
- EnigmaProxy
- FlashProxy
- FlexyProxies
- GonzoProxy
- Infatica
- LemonBright
- MangoProxy
- NextProxy
- NodeMaven
- NovaProxy
- ProxiesVision
- Proxiware
- Proxy-Seller
- ProxyEmpire
- ProxyGeo
- ProxyRack
- Proxyma
- Shifter
- Thordata
- VitalExclusive
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Proxy exits | Holder | RPKI |
|---|---|---|---|---|---|
| 12.72.128.0/17 since Oct 2025 | AS20057 | Mobile | 7 1 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/9 | AS7018 | Residential | 8,095 437 always on | AT&T Enterprises, LLC | |
| 12.0.0.0/8 | AS7018 | Residential | 13,255 715 always on | AT&T Enterprises, LLC |
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 12.0.0.0/8 | 16,777,216 | ATT | AT&T Enterprises, LLC (AEL-360) · US | Direct Allocation | Aug 23, 1983 | [email protected] |
| └ 12.72.0.0/15 | 131,072 | ATTSVC-12-72-0-0 | AT&T Worldnet Services (C00686968) · US | Reassigned | Oct 15, 2003 | [email protected] via ATT |
A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.
Network & registry
IPv4 market
Holder
- Organization
- AT&T Enterprises, LLC
- Handle
- AEL-360
- Range
- 12.0.0.0/8
- Registration type
- Direct Allocation
- Record created
- Aug 23, 1983
- Legacy
- yes
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 2026
- Current origin since
- Jan 2026 · 9 mo
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 12.72.136.0/21 | AS20057 | /21 | ARIN | RPKI valid |
| 12.72.128.0/17 | AS20057 | /17 | ARIN | Too specific |
Whois
Registration for this announcement
- Range
- 12.72.0.0/15
- Netname
- ATTSVC-12-72-0-0
- Registrant
- AT&T Worldnet Services
- Organization
- AT&T Worldnet Services (C00686968)
- Type
- Reassigned
- Handle
- NET-12-72-0-0-1
- Parent
- NET-12-0-0-0-1
- Created
- Oct 15, 2003
- RIR
- ARIN
- Country
- US
- Delegated
- Aug 23, 1983
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- abuse
- Phone
- +1-919-319-8167
- Handle
- ABUSE7-ARIN