166.203.0.0/16

Residential-proxy exits

Proxy exits

3

<0.01% of its addresses · 30 days

Spread

2 of 256

/24s with at least one exit

Providers

3

selling exits here

Oct 4, 2026 – Nov 2, 2026

Exits seen per day

4 observations

/24s with the most always-on exits

/24	Always-on exits	Proxy exits
166.203.163.0/24	0	2
166.203.136.0/24	0	1

Proxy providers listing exits

AnyIP
CliProxy
IPPeak

Announcements

Less specific

Covering announcements

Prefix	Origin	Type	Proxy exits	Holder	RPKI
166.200.0.0/14 since Aug 2026	AS7018	Residential	3	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

Arrived

Sort

Prefix	Origin	Type	Proxy exits	Holder
166.203.0.0/20 since Sep 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.16.0/20 since Sep 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.32.0/20 since Jan 2026	AS20057	Mobile		AT&T Enterprises, LLC
166.203.48.0/20 since Jul 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.64.0/20 since Jan 2020	AS20057	Mobile		AT&T Enterprises, LLC
166.203.80.0/20 since Jul 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.96.0/20 since Jul 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.112.0/20 since Jul 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.128.0/17 since Oct 2015	AS20057	Mobile	3	AT&T Enterprises, LLC
166.203.128.0/20 since Jun 2019	AS20057	Mobile	1	AT&T Enterprises, LLC
166.203.160.0/20 since Sep 2019	AS20057	Mobile	2	AT&T Enterprises, LLC
166.203.176.0/20 since Jan 2020	AS20057	Mobile		AT&T Enterprises, LLC
166.203.192.0/22 since Jun 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.196.0/22 since Apr 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.200.0/24 since Apr 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.204.0/23 since Mar 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.206.0/24 since Mar 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.208.0/20 since Nov 2018	AS20057	Mobile		AT&T Enterprises, LLC
166.203.224.0/20 since Jun 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.240.0/21 since Jun 2019	AS20057	Mobile		AT&T Enterprises, LLC
166.203.248.0/23 since Dec 2018	AS20057	Mobile		AT&T Enterprises, LLC
166.203.250.0/24 since Feb 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
166.203.0.0/16	AS20057	/16	ARIN	RPKI valid
166.200.0.0/14	AS7018	/14	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 15, 2026