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Data as of Nov 5, 2026

166.186.0.0/16

No anonymizer space · no proxy exits in 30 days

AT&T Enterprises, LLC

Announcement

this exact prefix

RPKI valid

Announced by

Type

Mobile

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Proxy exits	Holder	RPKI
166.184.0.0/13 since Aug 2026	AS7018	Residential	5	AT&T Enterprises, LLC

More specific

Announcements inside

Prefix	Origin	Type	Holder	RPKI
166.186.2.0/23 since Feb 2019	AS20057	Mobile	AT&T Enterprises, LLC
166.186.48.0/21 since Feb 2019	AS20057	Mobile	AT&T Enterprises, LLC
166.186.89.0/24 since Sep 2017	AS20057	Mobile	AT&T Enterprises, LLC
166.186.112.0/23 since Jun 2019	AS20057	Mobile	AT&T Enterprises, LLC
166.186.196.0/23 since Apr 2019	AS20057	Mobile	AT&T Enterprises, LLC

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

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

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
166.186.0.0/16	AS20057	/24	ARIN	RPKI valid
166.184.0.0/13	AS7018	/13	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