LAYER3 INTEL
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Data as of Nov 3, 2026

204.223.0.0/16

No anonymizer space · no proxy exits in 30 days

United States Department of Defense (DoD)

Announcement
204.222.0.0/15
No RPKI
Announced by
AS721
Type
Business

Announcements

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
PrefixOriginTypeHolderRPKI
204.223.8.0/21
since Apr 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.34.0/23
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.36.0/22
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.40.0/24
since Apr 2025
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.41.0/24
since Apr 2025
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.42.0/23
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.44.0/22
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.75.0/24
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.78.0/23
since Apr 2015
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.80.0/24
since Dec 2023
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.81.0/24
since Oct 2023
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.82.0/23
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.84.0/22
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.88.0/22
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.92.0/23
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.94.0/24
since Feb 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.96.0/20
since Apr 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.112.0/21
since Apr 2026
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.126.0/23
since Apr 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.128.0/21
since Dec 2023
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.136.0/21
since Jan 2024
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.144.0/21
since Apr 2021
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.152.0/22
since Feb 2024
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group
204.223.176.0/24
since Apr 2025
AS637BusinessUnited States Department of Defense (DoD)
via Marine Corps Cyberspace Operations Group

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
204.223.0.0/1665,536NETBLK-USMC-C2United States Department of Defense (DoD) (USDDD) · USDirect AllocationJan 5, 1995[email protected]
└ 204.223.0.0/1665,536NETBLK-USMC-C2Marine Corps Cyberspace Operations Group (UNOC) · USReallocatedAug 13, 2025[email protected]

Network & registry

AnnouncementRouting historyWhois & abuse
Announced by

Covering announcement 204.222.0.0/15

Prefix
204.222.0.0/15
Announced by
AS721 United States Department of Defense (DoD)
Type
Business
RPKI
No RPKI
RIR
ARIN
Registry

Holder

Organization
Not stated by the registry
Origin network

AS721

US
Name
United States Department of Defense (DoD)
Type
Business
Domain
mail.mil
Industry
Internet Service Provider (ISP)
Spamhaus ASN-DROP
not listed