Data as of Nov 5, 2026
198.51.43.0/24
No anonymizer space · no proxy exits in 30 daysHeadquarters, USAISC · reallocated from United States Department of Defense (DoD)
Announcement
this exact prefix
No RPKI
Announced by
Type
Business
Risk
0 / 100 · Low
Recent change
New origin Jun 2026
its first announcement on record
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 198.51.42.0/23 since Jun 2026 | AS1540 | Business | United 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.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 198.51.42.0/23 | 512 | HAMILTON-NET4 | United States Department of Defense (DoD) (USDDD) · US | Direct Allocation | Jan 26, 1993 | disa. |
| └ 198.51.42.0/23 | 512 | HAMILTON-NET4 | Headquarters, USAISC (HEADQU-3) · US | Reallocated | Aug 25, 2025 | — |
| └ 198.51.43.0/24 | 256 | AFRTS-BC-2 | Armed Forces Radio and Television - Broadcast Center (C11328863) · US | Reassigned | Aug 25, 2025 | — |
Network & registry
Registry
Holder
- Organization
- United States Department of Defense (DoD)
- Handle
- USDDD
- Range
- 198.
51. 42. 0/ 23 - Registration type
- Direct Allocation
- Record created
- Jan 26, 1993
- 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
Routing timeline
Covering aggregate above, the prefix's own history below
Summary
Routing history
- Pattern
- Stable
- First seen
- Jun 2026
- Current origin since
- Jun 2026 · 4 mo
- Origin networks
- 1
Whois
Registration for this announcement
- Range
- 198.
51. 43. 0/ 24 - Netname
- AFRTS-BC-2
- Registrant
- Armed Forces Radio and Television - Broadcast Center
- Organization
- Armed Forces Radio and Television - Broadcast Center (C11328863)
- Type
- Reassigned
- Handle
- NET-198-51-43-0-1
- Parent
- NET-198-51-42-0-2
- Created
- Aug 25, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 26, 1993
- Status
- assigned
Report abuse
Abuse contact
- disa.
columbus. ns. mbx. arin-registrations@ mail. mil - Name
- Registration
- Phone
- +1-844-347-2457
- Handle
- REGIS10-ARIN