LAYER3 INTEL
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Data as of Nov 8, 2026

66.6.208.0/20

No anonymizer space · no proxy exits in 30 days

Tierzero

Announcement
this exact prefix
No RPKI
Announced by
AS11509
Type
Internet provider
>99% of it

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
66.6.208.0/204,096TIERZERO-700LATierzero (TIERZ) · USDirect AllocationFeb 23, 2004abuse@tierzero.com
└ 66.6.208.0/24256NETSEC-TIERZERO-2327109003-1019unknown———
└ 66.6.209.0/24256TIERZERO-1107742976unknown———
└ 66.6.210.0/24256TIERZERO-1107743232unknown———
└ 66.6.212.0/23512TIERZERO-1107743744unknown———
└ 66.6.214.0/24256TIERZERO-1107744256unknown———
└ 66.6.215.0/24256TIERZERO-1107744512unknown———
└ 66.6.216.0/2732MMICMANLLCunknown———
└ 66.6.216.32/2732TIERZERO-1107744800unknown———
└ 66.6.216.64/2732TIERZERO-GLOBAL-1033unknown———
└ 66.6.216.96/2816TIERZERO-GLOBAL-1034unknown———
└ 66.6.216.112/2816TIERZERO-GLOBAL-1341unknown———
└ 66.6.216.128/2816TIERZERO-GLOBAL-1028unknown———
└ 66.6.216.144/2816TIERZERO-GLOBAL-1533unknown———
└ 66.6.216.160/2732TIERZERO-1107744928unknown———
└ 66.6.216.192/2816TIERZERO-GLOBAL-1030unknown———
└ 66.6.216.208/2816TIERZERO-GLOBAL-1534unknown———
└ 66.6.216.224/298TIERZERO-GLOBAL-1031unknown———
└ 66.6.216.232/298TIERZERO-1107745000unknown———
└ 66.6.216.240/298TIERZERO-GLOBAL-1251unknown———
└ 66.6.216.248/298TIERZERO-GLOBAL-1258unknown———
└ 66.6.217.0/24256TIERZERO-1107745024unknown———
└ 66.6.218.0/24256TIERZERO-1107745280unknown———
└ 66.6.219.0/24256TIERZERO-1107745536unknown———
└ 66.6.220.0/24256TIERZERO-1107745792unknown———
└ 66.6.221.0/24256TIERZERO-1107746048unknown———
└ 66.6.222.0/24256TIERZERO-GLOBAL-1040unknown———
└ 66.6.223.0/24256TIERZERO-1107746560unknown———

Composition

The types across the prefix's announced space, by addresses.

Announced space

Address share

Announced space

Types across the prefix

4,096 addresses
TypeAddressesShareRanges
Internet provider4,064>99%2
Business320.78%1

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Origin network

AS11509

US
Name
Tierzero
Type
Internet provider
Registered
Sep 15, 1998
Domain
tierzero.com
Website
www.tierzero.com/
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed