Autonomous system
AS56 DNIC-AS-00056
Unclassified ARIN
IPv4 addresses
7.98M
1,044 prefixes
IPv6 prefixes
0
counted as prefixes, not addresses
Countries
1
mostly US
Flagged prefixes
0
none
Summary
US Department of Defense
government military legacy
An early US Department of Defense allocation (DNIC-AS-00056), registered
through the DoD Network Information Center (DNIC).
What it's used for
- US government / military networking operated under the Department of Defense.
Notable
- A DoD network, not a commercial ISP or host. Registered to the DoD Network Information Center (DNIC), which holds many federal ASNs.
- Announces a large block of legacy DoD address space, reflecting the department's early and extensive presence on the internet.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Address space
Summary
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1,044 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS56- Registry name
- DNIC-AS-00056
- Registrant
- United States Department of Defense (DoD)
- Abuse contact
- disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
- Registered
- 1985-12-18
- Last changed
- 2025-09-12
- Status
- active
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
No IC3 indicators Nothing from the FBI IC3 feed.
Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere