Data as of Nov 3, 2026
155.217.0.0/16
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
Recent change
New origin Aug 2026
from AS367 United States Department of Defense (DoD)
Announcements
Less specific
Covering announcements
| Prefix | Origin | Type | RPKI |
|---|---|---|---|
| 155.216.0.0/14 since Dec 2010 | AS721 | Business |
More specific
Announcements inside
| Prefix | Origin | Type | Holder | RPKI |
|---|---|---|---|---|
| 155.217.249.0/24 since May 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 |
|---|---|---|---|---|---|---|
| 155.217.0.0/16 | 65,536 | EUSTIS-EMH1 | United States Department of Defense (DoD) (USDDD) · US | Direct Allocation | Jan 28, 1992 | [email protected] |
| └ 155.217.0.0/16 | 65,536 | EUSTIS-EMH1 | Headquarters, USAISC (HEADQU-3) · US | Reallocated | Aug 22, 2025 | [email protected] |
Network & registry
Registry
Holder
- Organization
- United States Department of Defense (DoD)
- Handle
- USDDD
- Range
- 155.217.0.0/16
- Registration type
- Direct Allocation
- Record created
- Jan 28, 1992
- Legacy
- yes
- Reallocated to
- Headquarters, USAISC (HEADQU-3)
- Reallocated
- Aug 22, 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
- Rotating
- First seen
- May 2005
- Current origin since
- Aug 2026 · 2 mo
- Origin networks
- 4
- Last change of origin
- Aug 2026
Recorded history
History
- Handoffs
- 3
Whois
Registration for this announcement
- Range
- 155.217.0.0/16
- Netname
- EUSTIS-EMH1
- Registrant
- Headquarters, USAISC
- Organization
- Headquarters, USAISC (HEADQU-3)
- Org address
- NETC-ANC CONUS TNOSC, Fort Huachuca, AZ, 85613
- Org country
- US
- Type
- Reallocated
- Handle
- NET-155-217-0-0-2
- Parent
- NET-155-217-0-0-1
- Created
- Aug 22, 2025
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 28, 1992
- Status
- assigned
Report abuse
Abuse contact
- [email protected]
- Name
- No, Contact Known
- Phone
- +1-800-555-1234
- Handle
- CKN23-ARIN