Data as of Nov 3, 2026
199.10.42.0/23
No anonymizer space · no proxy exits in 30 daysHeadquarters, USAISC
Announcement
this exact prefix
No RPKI
Announced by
Type
Business
Recent change
New origin Oct 23, 2026
from AS367 United States Department of Defense (DoD)
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 |
|---|---|---|---|---|---|---|
| 199.10.42.0/24 | 256 | ANSOC-RNET002 | unknown | — | — | — |
| └ 199.10.42.0/24 | 256 | ANSOC-RNET002 | Headquarters, USAISC (HEADQU-3) · US | Allocation | Aug 25, 2025 | [email protected] |
| 199.10.43.0/24 | 256 | ANSOC-RNET014 | unknown | — | — | — |
| └ 199.10.43.0/24 | 256 | ANSOC-RNET014 | Headquarters, USAISC (HEADQU-3) · US | Allocation | Aug 25, 2025 | [email protected] |
Network & registry
Registry
Holder
- Organization
- Not stated by the registry
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
Who has announced this prefix
Summary
Routing history
- Pattern
- Rotating
- First seen
- Apr 2024
- Current origin since
- Oct 23, 2026 · under a month
- Origin networks
- 2
- Last change of origin
- Oct 23, 2026
Recorded history
History
- Handoffs
- 1
Whois
Registration for this announcement
199.10.42.0/23 spans several registrations: 4 records are listed under Registrations.
- RIR
- ARIN
- Country
- US
- Delegated
- Dec 2, 1993
- Status
- assigned