Autonomous system
AS5133 DNIC-ASBLK-05120-05376
Unclassified ARIN
IPv4 addresses
23.81K
11 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
A US Department of Defense network from the block DNIC-ASBLK-05120-05376,
registered to the DoD Network Information Center (DNIC).
What it's used for
- Operational US Navy networking. Most of the space it originates sits in
163.249.0.0/16and is registered to the Navy Network Information Center (NNIC) rather than the generic DoD NIC.
Notable
- A government / military network, not a commercial ISP or host.
- The ASN registration itself is generic to the DoD block, so no specific base, command, or unit is publicly identified. The Navy attribution comes from the registration of the address blocks it announces.
Interesting
- The DoD holds AS5120 through AS5376 as one contiguous DNIC block, so this ASN's neighbours are almost all sibling military networks rather than unrelated organisations.
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 | 11 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS5120- Registry name
- DNIC-ASBLK-05120-05376
- Registrant
- United States Department of Defense (DoD)
- Abuse contact
- disa.columbus.ns.mbx.hostmaster-dod-nic@mail.mil
- Registered
- 1995-05-09
- 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