LAYER3 INTEL
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Data as of Nov 4, 2026

6.66.236.0/23

No anonymizer space · no proxy exits in 30 days

Headquarters, USAISC · reallocated from United States Department of Defense (DoD)

Announcement
this exact prefix
No RPKI
Announced by
AS1540
Type
Business
Recent change
New origin May 2026
from AS367 United States Department of Defense (DoD)

Announcements

More specific

Announcements inside

PrefixOriginTypeHolderRPKI
6.66.237.0/24
since Oct 2023
AS749BusinessUnited States Department of Defense (DoD)
via Headquarters, USAISC

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
6.0.0.0/816,777,216CONUS-YPG-NETUnited States Department of Defense (DoD) (USDDD) · USDirect AllocationFeb 1, 1994[email protected]
└ 6.0.0.0/816,777,216CONUS-YPG-NETHeadquarters, USAISC (HEADQU-3) · USReallocatedAug 25, 2025—

Network & registry

AnnouncementRouting historyWhois & abuse
Registry

Holder

Organization
United States Department of Defense (DoD)
Handle
USDDD
Range
6.0.0.0/8
Registration type
Direct Allocation
Record created
Feb 1, 1994
Legacy
yes
Reallocated to
Headquarters, USAISC (HEADQU-3)
Reallocated
Aug 25, 2025
Origin network

AS1540

US
Name
Headquarters, USAISC
Type
Business
Registered
May 12, 2004
Domain
mail.mil
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed