Autonomous system detail

AS35

Announced

Operated by MITRE-AS-1 - The MITRE Corporation.

Summary

// analyst note
A legacy FFRDC allocation with minimal routing presence in 2026 — most MITRE traffic likely rides its other ASNs (AS64, AS5691). ARIN ASN RegDate is blank; reject any 0000-00-00 placeholder.
// security note
NEUTRAL/DATED: no notable public abuse signal found as of 2026-06-08; clean FFRDC/government-adjacent network.
IPv4 prefixes
9
~136.4K 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: Medium

AS35 is a legacy allocation registered under ARIN to The MITRE Corporation, the Bedford, MA operator of federally funded research and development centers (FFRDCs). Associated legacy netblocks include 128.29.0.0/16 (NetName MITRE, registered 1983-10-24; "MITRE" appears in the RFC 1166 network table at 128.29), plus 192.12.x, 192.47.242.0/24, and 192.52.194.0/24. The ASN is near-dormant in 2026: it shows very low BGP visibility, with roughly one observed upstream and one peer, and originates at most a handful of prefixes in MITRE ranges, with origin attribution split across MITRE's other ASNs — so most MITRE traffic likely rides AS64 (MITRE-AS-2) and AS5691. The ARIN ASN RegDate field is blank (legacy, predating ARIN RegDate tracking; the autnum was updated 2012-04-02), while MITRE's org record shows a 1985-09-04 RegDate; any 0000-00-00 placeholder seen on third-party mirrors is not a real date. For triage this is a legacy FFRDC allocation with minimal routing presence. No notable public abuse signal was found as of June 2026.

Operator
The MITRE Corporation (ARIN OrgId THEMIT-1-Z, Bedford, MA) [Confirmed] — ARIN RDAP
Country / RIR
US, ARIN [Confirmed]
Allocated
ARIN ASN RegDate blank (legacy; autnum updated 2012-04-02); MITRE org record RegDate 1985-09-04; 0000-00-00 on mirrors is NOT a real date; original ASN assignment Unknown
Org status
active organization, near-dormant ASN

Security/abuse context (NEUTRAL, DATED)

no notable public abuse signal found as of 2026-06-08; clean FFRDC/government-adjacent network — ipip.net

Network & routing

Network type
government / FFRDC [Confirmed]
Size
near-dormant; at most a handful of prefixes in MITRE ranges (128.29.0.0/16, 192.x); exact current count not confirmable this cycle — bgp.he.net / ipinfo.io (2026-06)
Routing/peering
near-dormant; ~1 upstream, ~1 peer; RPKI unknown — ipinfo.io
Notable usage
The MITRE Corporation (FFRDC operator); legacy netblock 128.29.0.0/16 (NetName MITRE, registered 1983-10-24; in RFC 1166 table) — mitre.org
Related ASNs
AS64 (MITRE-AS-2), AS5691 (The MITRE Corporation) [Confirmed]
Analyst note
A legacy FFRDC allocation with minimal routing presence in 2026 — most MITRE traffic likely rides its other ASNs (AS64, AS5691).
[ 02 ] — Announced prefixes

What this network routes.

9 prefixes total · RIPEstat data · cached, not real-time
// IPv4 prefixes9
  1. 128.29.0.0/16/16
  2. 129.83.0.0/16/16
  3. 66.170.232.0/21/21
  4. 66.170.224.0/21/21
  5. 198.49.146.0/24/24
  6. 192.160.51.0/24/24
  7. 192.52.194.0/24/24
  8. 192.190.70.0/24/24
  9. 192.80.55.0/24/24
// IPv6 prefixes0
No IPv6 prefixes announced.
[ 03 ] — Notable peers & upstreams

Who it talks to.

1 observed neighbour
// Notable connectionsTop 1 of 1
ASNOperatorRole
AS3356 LEVEL3 - Level 3 Parent, LLC upstream
Neighbours observed via public BGP collectors; not a complete peering list.