Data as of Nov 13, 2026

12.72.121.0/24

1 residential-proxy exit · 30 days

AT&T Enterprises, LLC

Announcement

12.72.0.0/17

RPKI valid

Announced by

AS20057

Type

Mobile

Risk

10 / 100 · Low

Shared address

Residential-proxy exits

Proxy exits

0.39% of its addresses · 30 days

Providers

selling exits here

Oct 14, 2026 – Nov 12, 2026

Exits seen per day

10 observations

Proxy providers listing exits

ColaProxy
Thordata

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Proxy exits	Holder	RPKI
12.0.0.0/9	AS7018	Residential	8,124 289 always on	AT&T Enterprises, LLC
12.0.0.0/8	AS7018	Residential	13,497 535 always on	AT&T Enterprises, LLC

Registrations in this block

The registry's network records over this block, widest first, each 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	abuse@att.net
└ 12.72.0.0/15	131,072	ATTSVC-12-72-0-0	AT&T Worldnet Services (C00686968) · US	Reassigned	Oct 15, 2003	abuse@att.net 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

Announcement Routing history RPKI & IRR Whois & abuse

Routing timeline

Covering aggregate above, the prefix's own history below

12.72.0.0/17

Routing history

Pattern: Stable
First seen: Jul 2023
Current origin since: Jul 2023 · 3.3 yr
Origin networks: 1

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
12.72.0.0/17	AS20057	/17	ARIN	RPKI valid

IRR

Route objects on 12.72.0.0/17

Origin	Registry	Description	Maintainer	Modified
AS20057	ARIN	AT&T Enterprises, LLC	MNT-AEL-360	Sep 22, 2026