Autonomous system detail

AS126

Announced

Operated by DNIC-AS-00126 - United States Department of Defense (DoD).

Summary

// analyst note
Minimally active DoD network; one /24 in the routing table via a DoD internal AS (AS27065). Distinguish the current DoD holder from the historical Mare Island Navy label. RegDate 1987-09-09 (Confirmed ARIN).
// security note
NEUTRAL/DATED: no notable public abuse signal as of 2026-06-10; government network.
IPv4 prefixes
1
~256 addresses
IPv6 prefixes
0
—
Peer networks
1
1 up · 0 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: High

AS126 is a legacy fall-1987 DoD/DNIC allocation registered under ARIN to the United States Department of Defense (OrgId USDDD, 3990 E. Broad Street, Columbus OH), carrying the handle "DNIC-AS-00126." Its historical RFC-era label was "MINSY-POE-AS / Mare Island Naval Shipyard" — a now-closed California naval shipyard — another case where the legacy label no longer matches the current generic DoD holder. The ARIN autnum RegDate is 1987-09-09 (registry updated 2025-09-12; org RegDate 2007-01-12). It is minimally active, announcing a single IPv4 /24 (134.229.217.0/24, 256 addresses) with peer/upstream the DoD internal AS27065. For triage this is a minimally active DoD network — one /24 in the routing table via a DoD internal AS; distinguish the current DoD holder from the historical Mare Island Navy label. No notable public abuse signal was found as of June 2026.

Operator
United States Department of Defense (DoD) (ARIN OrgId USDDD, Columbus OH) [Confirmed] — ARIN RDAP via ipgeolocation. NOT Mare Island Naval Shipyard (historical label).
Country / RIR
US, ARIN [Confirmed]
Allocated
ARIN autnum RegDate 1987-09-09 (registry updated 2025-09-12; org RegDate 2007-01-12) [Confirmed]
Org status
active

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal as of 2026-06-10; government network — ipgeolocation.io

Network & routing

Network type
government / military (DoD) [Confirmed]
Size
1 IPv4 prefix (134.229.217.0/24, 256 addrs), 0 IPv6 — ipgeolocation (2026-06)
Routing/peering
minimally active; peer/upstream AS27065 (DoD internal); RPKI unknown — ipgeolocation.io
Notable usage
[historical] RFC-era label "MINSY-POE-AS / Mare Island Naval Shipyard" (now-closed CA naval shipyard). [current] a DoD DNIC AS announcing one /24 via DoD internal AS27065 — defense.gov
Related ASNs
AS27065 (DoD internal — peer/upstream); DoD DNIC family (AS94/AS95/AS96/AS115/AS118/AS121/AS124) [Confirmed/Likely]
Analyst note
Minimally active DoD network; one /24 in the routing table via a DoD internal AS. Distinguish the current DoD holder from the historical Mare Island Navy label.
[ 02 ] — Announced prefixes

What this network routes.

1 prefixes total · RIPEstat data · cached, not real-time
// IPv4 prefixes1
  1. 134.229.217.0/24/24
// IPv6 prefixes0
No IPv6 prefixes announced.
[ 03 ] — Notable peers & upstreams

Who it talks to.

1 observed neighbour
// Notable connectionsTop 1 of 1
ASNOperatorRole
AS27065 DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD) upstream
Neighbours observed via public BGP collectors; not a complete peering list.