Autonomous system
AS5132 DNIC-ASBLK-05120-05376
Unclassified ARIN
IPv4 addresses
0
0 prefixes
IPv6 prefixes
4
counted as prefixes, not addresses
Countries
1
mostly US
Flagged prefixes
0
none
Summary
US Department of Defense
government military research 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
- DoD research networking. Everything it originates comes from
2001:480::/32, the address range of the Defense Research and Engineering Network (DREN), whose blocks are registered to the DoD's High Performance Computing program.
Notable
- A government / military network, not a commercial ISP or host.
- Unusually, this ASN announces only IPv6 — a handful of
/48s and no IPv4 at all, which is why its IPv4 count is zero. - The generic DNIC block registration does not name a specific base or unit beyond the Department of Defense.
Interesting
- DREN is the DoD's high-performance computing and research backbone, and it was an early and aggressive adopter of IPv6 within the US federal government. An IPv6-only ASN is a fingerprint of that lineage.
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 | 4 |
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