Autonomous system
AS5277 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD)
Unclassified ARIN
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.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS747 | Headquarters, USAISC | 1,060 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-12, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 28 prefixes · 265K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 29 |
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
- 2026-09-25
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 21 with no ROA
- ROAs
- 0 authorising AS5277
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 21 announcements 4 other origin
- Route objects
- 0 naming AS5277
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 455 networks and 1,849 prefixes, as published 2026-11-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere