Data as of Nov 10, 2026

166.136.0.0/16

No anonymizer space · no proxy exits in 30 days

AT&T Enterprises, LLC

Announcement

this exact prefix

RPKI valid

Announced by

AS20057

Type

Mobile

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Proxy exits	Holder	RPKI
166.136.0.0/15 since Aug 2026	AS7018	Residential	243 1 always on	AT&T Enterprises, LLC

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
166.136.112.0/22 since Apr 2015	AS20057	Mobile	AT&T Enterprises, LLC
166.136.150.0/23 since Jun 2020	AS20057	Mobile	AT&T Enterprises, LLC
166.136.162.0/24 since Mar 2019	AS20057	Mobile	AT&T Enterprises, LLC
166.136.164.0/22 since Mar 2019	AS20057	Mobile	AT&T Enterprises, LLC
166.136.170.0/23 since Jul 2019	AS20057	Mobile	AT&T Enterprises, LLC
166.136.173.0/24 since Nov 2019	AS20057	Mobile	AT&T Enterprises, LLC
166.136.174.0/23 since Nov 2019	AS20057	Mobile	AT&T Enterprises, LLC
166.136.176.0/24 since Oct 2018	AS20057	Mobile	AT&T Enterprises, LLC
166.136.192.0/22 since Aug 2014	AS20057	Mobile	AT&T Enterprises, LLC
166.136.212.0/22 since Dec 2017	AS20057	Mobile	AT&T Enterprises, LLC

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Routing timeline

Covering aggregate above, the prefix's own history below

Summary

Routing history

Pattern: Stable
First seen: Dec 2005
Current origin since: Feb 2008 · 19 yr
Origin networks: 2
Last change of origin: Feb 2008

Recorded history

History

Handoffs: 1

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
166.136.0.0/16	AS20057	/24	ARIN	RPKI valid
166.136.0.0/15	AS7018	/15	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 1, 2026