Autonomous system
AS5277 AS5277
Unclassified ARIN
IPv4 addresses
266K
27 prefixes
IPv6 prefixes
0
counted as prefixes, not addresses
Countries
1
mostly Unknown
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
- US Army networking. The address blocks it originates are registered to Headquarters, USAISC — the Army's information-systems command, whose registry contact sits at Fort Huachuca, Arizona.
Notable
- A government / military network, not a commercial ISP or host.
- The blocks carry theatre-oriented names: several are labelled
KOREA1throughKOREA6, alongside one named for the Yuma Proving Ground, plus space from the DoD's215.0.0.0/8. - The ASN registration itself is generic to the DoD block. The Army attribution comes from the registration of the address space it announces, not from the AS record.
Interesting
- Military ASNs often reveal geography through the names of their address blocks rather than through geolocation, and this is a clear case: the routing is generic, but the block names read like a posture map.
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 |
|---|---|---|
| Unknown | 27 |
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