Trig Avionics Limited — 70:58:46 (MA-L)

Trig Avionics Limited holds a single MA-L block, OUI 70:58:46, registered to the company at Heriot Watt Research Park, Edinburgh, GB EH14 4AP. Trig is a niche certified-avionics manufacturer founded in January 2004 and, since May 2025, part of The Dynon Group following a tie-up with Dynon Avionics. Its product line is general and unmanned aviation hardware: Mode S transponders (ADS-B capable — TT21, TT22, TT23, TT26, TT31), VHF radios, Nav/Com units, GPS receivers (TN70, TN72), and audio panels (TMA44, TMA45). The block resolves cleanly to Trig at the registry level, but product-level resolution is uncertain. Most Trig devices communicate via 1090 MHz RF (ADS-B/Mode S), RS232/RS485 serial, or short-range Bluetooth (the TMA45 audio panel) — not standard IP/Ethernet networking. The only Trig product with a known wireless MAC interface is the TMA45 (Bluetooth for stereo audio and mobile-device pairing), so that is the most plausible carrier of a 70:58:46 address, but no public Trig documentation or FCC filing confirms the OUI maps to any specific product. For network triage this matters: a 70:58:46 MAC on an enterprise or general IP network is anomalous — this is cockpit-installed avionics hardware, and its presence on a normal network warrants asking why avionics equipment is network-connected at all. Trig is UK-based with EASA and FAA approvals and carries no US covered-list restrictions; no Trig-specific CVEs were found, and the unencrypted-broadcast nature of 1090ES ADS-B is an industry-wide protocol characteristic, not a Trig-specific defect.

IEEE assignment

70:58:46 → Trig Avionics Limited, Heriot Watt Research Park, Edinburgh, GB EH14 4AP [Confirmed] — IEEE MA-L (oui.csv), enrichment/registries/oui.csv line 359

Registry / block size

MA-L (24-bit OUI); single block [Confirmed] — IEEE MA-L; no matching MA-M (mam.csv) or MA-S (oui36.csv) records

HQ / country

Heriot Watt Research Park, Edinburgh, Scotland, GB (registry address); European office in Amersfoort, Netherlands (added 2018) [Confirmed] — trig-avionics.com/about-us

Company status

active; founded January 2004 by Andy Davis; joined The Dynon Group (with Dynon Avionics) May 2025; holds EASA and FAA Design Organisation and Production Organisation approvals; 800+ approved dealers in 42 countries [Confirmed] — trig-avionics.com/about-us

Industry

certified general-aviation avionics [Confirmed] — trig-avionics.com/products

Device types / notable products

Mode S transponders (ADS-B capable — TT21, TT22, TT23, TT26, TT31); VHF radios; Nav/Com units; GPS receivers (TN70, TN72); audio panels (TMA44, TMA45); antennas; TT26 UAS ADS-B transponder (RS232/RS485, 1090ES, to 70,000 ft) [Confirmed] — trig-avionics.com/products, trig-avionics.com/tt26-new-product-and-new-partnership

Device type for this OUI

most plausibly the TMA45 audio panel (the only public Trig product with a Bluetooth/wireless MAC); product-level mapping NOT corroborated by any public Trig doc or FCC filing — treat as "avionics device — Trig Avionics" without confirmed product resolution [Likely] — trig-avionics.com/product/audio-panel, fcc.report/company/Trig-Avionics-L-T-D

Wireless connectivity

TMA45 — Bluetooth (stereo music, 2 portable devices); transponders — 1090 MHz RF only (not Ethernet/WiFi); TT26 — RS232/RS485 serial; no WiFi (802.11) product confirmed in public documentation [Confirmed] — trig-avionics.com/product/audio-panel, trig-avionics.com/tt26-new-product-and-new-partnership

FCC filings

12 filings under grantee code VZI (Trig Avionics Limited), 2008–2025; reviewed VZI01905 (2021, 1090 MHz transponder, 2.88W) and VZI02294 (2025, 1090 MHz transponder, 248W) — licensed non-broadcast aviation transponders, no Bluetooth/WiFi; no standalone Bluetooth-module filing found [Confirmed] — fcc.report/company/Trig-Avionics-L-T-D, fccid.io/VZI01905, fccid.io/VZI02294

Registration date

Unknown — IEEE publishes NO assignment/registration date in oui.csv (columns are only Registry, Assignment, Organization Name, Organization Address); any third-party "date registered" is a database artifact, not an IEEE fact [Confirmed]

Security context

Trig transponders use 1090 MHz ADS-B, an industry-wide unencrypted broadcast standard with no message authentication — a class-level characteristic of all 1090ES equipment, not a Trig-specific vulnerability; ADS-B spoofing via SDR is a documented aviation-industry problem; no Trig-specific CVEs or disclosures found; TMA45 Bluetooth is short-range audio-only with no advisories; UK entity, no US covered-list restrictions [Likely] — researchgate.net (ADS-B spoofing, Ko et al. 2021), fccid.io/VZI01905

Analyst note

70:58:46 is a single MA-L block resolving to a niche certified-avionics maker. Seeing it on an IP/enterprise network is anomalous — Trig hardware is aircraft-installed and communicates via 1090 MHz RF, RS232/RS485, or short-range Bluetooth, not standard IP networking. The TMA45 audio panel is the most plausible product carrier, but no public source confirms the product-level mapping. Company joined Dynon Avionics group May 2025; carries no regulatory restrictions. [Likely] — trig-avionics.com/about-us, trig-avionics.com/products