Autonomous system
AS391 AFCONC-BLOCK1-AS
Unclassified ARIN
Summary
US Air Force (Air Force Systems Networking)
government military legacy
A US Air Force allocation (AFCONC-BLOCK1-AS) registered to Air Force Systems Networking, part of a block of low AS numbers held by the US Air Force at Maxwell AFB / Gunter Annex in Alabama.
What it's used for
- Networking for US Air Force / Department of Defense sites.
Notable
- A US military network, not a commercial ISP or host. Belongs to a contiguous early-internet block of Air Force AS numbers registered in 1989.
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 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS27064 | United States Department of Defense (DoD) | 2,384 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-20, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 42 prefixes · 284K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 42 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS379- Registry name
- AFCONC-BLOCK1-AS
- Registrant
- Air Force Systems Networking
- Abuse contact
- disa.columbus.ns.mbx.arin-registrations@mail.mil
- Registered
- 1989-08-04
- Last changed
- 2008-06-06
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 40 with no ROA
- ROAs
- 0 authorising AS391
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 40 announcements
- Route objects
- 0 naming AS391
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: 442 networks and 1,779 prefixes, as published 2026-10-21. 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