Data as of Nov 15, 2026
204.223.78.0/23
No anonymizer space · no proxy exits in 30 daysUnited States Department of Defense (DoD)
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | RPKI |
|---|---|---|---|
| 204.222.0.0/15 since Aug 2011 | AS721 | Business |
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.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 204.223.0.0/16 | 65,536 | NETBLK-USMC-C2 | United States Department of Defense (DoD) (USDDD) · US | Direct Allocation | Jan 5, 1995 | disa. |
| └ 204.223.0.0/16 | 65,536 | NETBLK-USMC-C2 | Marine Corps Cyberspace Operations Group (UNOC) · US | Reallocated | Aug 13, 2025 | disa. |
Network & registry
Registry
Holder
- Organization
- United States Department of Defense (DoD)
- Handle
- USDDD
- Range
- 204.
223. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Jan 5, 1995
- Legacy
- yes
- Reallocated to
- Marine Corps Cyberspace Operations Group (UNOC)
- Reallocated
- Aug 13, 2025
Origin network
AS637
US
- Name
- United States Department of Defense (DoD)
- Type
- Business
- Registered
- Apr 19, 1990
- Domain
- mail.mil
- Industry
- Military, Defense, National Security, and International Affairs
- Spamhaus ASN-DROP
- not listed
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Sep 2005
- Current origin since
- Apr 2015 · 12 yr
- Origin networks
- 3
- Last change of origin
- Dec 2016
Recorded history
History
- Handoffs
- 3
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS637 | NTTCOM | CenturyLink Proxy object | MAINT-JOB | Sep 1, 2016 |
Whois
Registration for this announcement
- Range
- 204.
223. 0. 0/ 16 - Netname
- NETBLK-USMC-C2
- Registrant
- Marine Corps Cyberspace Operations Group
- Organization
- Marine Corps Cyberspace Operations Group (UNOC)
- Org address
- COMMANDING OFFICER, MCNOSC, QUANTICO, VA, 22134
- Org country
- US
- Type
- Reallocated
- Handle
- NET-204-223-0-0-2
- Parent
- NET-204-223-0-0-1
- Created
- Aug 13, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 5, 1995
- Status
- assigned
Report abuse
Abuse contact
- disa.
columbus. ns. mbx. hostmaster-dod-nic@ mail. mil - Name
- Network DoD
- Phone
- +1-844-347-2457
- Handle
- MIL-HSTMST-ARIN