Autonomous system detail

AS120

Not announced

Operated by MITRE-OMAHA - The MITRE Corporation.

Summary

// analyst note
A legacy institutional/FFRDC allocation that appears dormant in the global routing table; encountered mainly in historical RFC/registry research rather than live traffic. Dormancy assessed (confidence Medium); ARIN RDAP RegDate 1987-08-04 (Confirmed).
// security note
NEUTRAL/DATED: no notable public abuse signal found as of 2026-06-10; clean institutional/FFRDC allocation.
IPv4 prefixes
0
~0 addresses
IPv6 prefixes
0
—
Peer networks
0
0 up · 0 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: Medium

AS120 is a legacy summer-1987 allocation registered under ARIN to The MITRE Corporation, carrying the handle "MITRE-OMAHA" — a not-for-profit that operates federally funded research-and-development centers (FFRDCs) for U.S. government sponsors. The "OMAHA" handle historically points to MITRE's Omaha, Nebraska presence supporting U.S. Strategic Command / Offutt AFB work. MITRE's primary current routing runs on other ASNs — AS64 (MITRE-AS-2, allocated 1986-03-04, profiled earlier in this sweep) and AS5691 (MITRE-AS-5, allocated 1995-08-24) — and AS120 itself appears dormant, showing no peers/upstreams/downstreams in routing data (hence confidence Medium pending a direct table snapshot). The ARIN RDAP RegDate is 1987-08-04 (Confirmed); note that IPinfo shows a 0000-00-00 placeholder, which is not a real date. For triage this is an old institutional/FFRDC allocation encountered mainly in historical registry research rather than live traffic. No notable public abuse signal was found as of June 2026.

Operator
The MITRE Corporation (FFRDC operator) [Confirmed] — ARIN / IPinfo / IPQualityScore
Country / RIR
US, ARIN [Confirmed]
Allocated
ARIN RDAP RegDate 1987-08-04 [Confirmed] — ARIN RDAP; IPinfo 0000-00-00 is a placeholder, not real
Org status
active organization; this ASN dormant/legacy

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-10; clean institutional/FFRDC allocation — ipinfo.io

Network & routing

Network type
FFRDC (federally funded R&D center) [Confirmed]
Size
appears dormant — no peers/upstreams/downstreams in routing data (assessed, not table-confirmed) — ipinfo.io (2026-06)
Routing/peering
none observed; RPKI n/a — ipinfo.io
Notable usage
[historical] "MITRE-OMAHA" handle points to MITRE's Omaha, NE presence supporting USSTRATCOM/Offutt AFB. [current] MITRE's live routing is on AS64 (MITRE-AS-2) and AS5691 (MITRE-AS-5); AS120 dormant — mitre.org
Related ASNs
AS64 (MITRE-AS-2), AS5691 (MITRE-AS-5), AS35 (MITRE) [Confirmed]
Analyst note
A legacy institutional/FFRDC allocation that appears dormant in the global routing table; encountered mainly in historical RFC/registry research rather than live traffic. Date is Confirmed (ARIN RDAP RegDate 1987-08-04).
[ 02 ] — Announced prefixes

What this network routes.

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

Who it talks to.

0 observed neighbours
Neighbour data unavailable from public BGP collectors.