Data as of Nov 7, 2026

199.21.178.0/24

3 residential-proxy exits · 30 days

Premium Choice Broadband · space held by Cornerstone Communications, LLC

Announcement

199.21.176.0/22

RPKI valid

Announced by

AS398576

Type

Residential

Risk

0 / 100 · Low

Residential-proxy exits

Proxy exits

1.2% of its addresses · 30 days

Providers

selling exits here

Oct 8, 2026 – Nov 6, 2026

Exits seen per day

14 observations

Proxy providers listing exits

BottingTools
ByteProxies
Byteful
CatProxies
ColaProxy
Geonode
GloryCloud
IPRoyal
InfiniteProxies
LemonBright
NextProxy
ProxyEmpire
ProxyRack
Thordata
VitalExclusive
WealthProxies

Network & registry

Announcement Routing history RPKI & IRR Whois & abuse

Announced by

Covering announcement 199.21.176.0/22

Prefix: 199.21.176.0/22
Announced by: AS398576 Premium Choice Broadband
Type: Residential
Proxy exits: 4
RPKI: RPKI valid
Netname: CCMAINE-BLK-3
Registrant: Cornerstone Communications, LLC
RIR: ARIN

Origin network

AS398576

Name: Premium Choice Broadband
Type: Internet provider
Registered: Jul 14, 2020
Domain: premiumchoicebroadband.com
Industry: Internet Service Provider (ISP)
Spamhaus ASN-DROP: not listed

RPKI

Route origin authorizations

ROA prefix	ASN	Max len	Anchor	Verdict
199.21.176.0/22	AS46188	/22	ARIN	Another network
199.21.176.0/22	AS398576	/22	ARIN	RPKI valid

IRR

Route objects on 199.21.176.0/22

Origin	Registry	Description	Maintainer	Modified
AS46188 not the origin	ALTDB	Premium Choice Broadband	MAINT-TVC	Aug 13, 2018
AS46188 not the origin	ARIN	Cornerstone Communications, LLC	MNT-CCL-216	Jul 17, 2025
AS398576	ARIN	Cornerstone Communications, LLC	MNT-CCL-216	Jul 17, 2025

199.21.178.0/24

Residential-proxy exits

Exits seen per day

Proxy providers listing exits

Network & registry

Covering announcement 199.21.176.0/22

AS398576

Who has announced 199.21.176.0/22

Routing history

History

Route origin authorizations

Route objects on 199.21.176.0/22

Registration for this announcement

Abuse contact