Theissen Training Systems — 2 prefixes (MA-L)

The slug vendor-theissen-training-systems covers two distinct IEEE MA-L assignments that collapse to one entry because the repo's slugifier strips legal-entity suffixes: 3C:47:9B, registered to "Theissen Training Systems, Inc." in Chiefland, FL, US, and 80:CE:B1, registered to "Theissen Training Systems GmbH" in Duesseldorf, NRW, Germany. These are related but legally separate entities — a German parent and a US subsidiary — rather than one company with two blocks, so this is a two-OUI consolidated vendor page rather than a single-OUI registration. Theissen Training Systems (TTS) manufactures live-fire military and law-enforcement range infrastructure: electronic target scoring systems, shooting-range control systems, turning-target and target-retrieval hardware, and MOUT/CALFEX range systems, deployed across 35+ countries. Corporate lineage traces to a 1934 German firm (Fritz Theissen & Söhne) that rebranded as Theissen Training Systems in 1993 when it focused on targetry, and the company has held ISO 9001 certification since 2001. This is a niche defense/government-market vendor rather than a consumer or general-purpose networking manufacturer, which explains the low public research footprint (no CVEs, no security advisories) despite decades of operating history and two active OUI blocks.

IEEE assignments

3C:47:9B → "Theissen Training Systems, Inc.", 1225 SE 4th Terrace, Chiefland, FL, US 32626; 80:CE:B1 → "Theissen Training Systems GmbH", Schuchardstrasse 3, Duesseldorf, NRW, DE 40595 [Confirmed] — the IEEE MA-L registry (local IEEE MA-L snapshot), cross-checked live via api.macvendors.com/3C:47:9B

Registry / block size

both MA-L (24-bit OUI); no matches for this vendor in the MA-M (the IEEE MA-S registry) or MA-S (the IEEE MA-M registry) registries [Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry, the IEEE MA-M registry

Assignment dates

not recorded. IEEE's public MA-L export (Registry, Assignment, Organization Name, Organization Address columns only) publishes no dates; api.macvendors.com returned no date field; maclookup.app per-prefix pages 404'd for both prefixes so could not be corroborated [Confirmed] — the IEEE MA-L registry

Company identity / history

TTS traces to a 1934 German firm (Fritz Theissen & Söhne), rebranded Theissen Training Systems in 1993 with a targetry focus; ISO 9001 QMS since 2001; operates a German GmbH (Duesseldorf) and a US Inc. subsidiary serving Army/Marine Corps/Navy/Air Force customers [Likely — single-source company-site history, not independently corroborated] — https://theissentraining.com/company/, https://www.theissentraining.net/about-us

Device / product context

electronic target scoring systems (automated hit detection/scoring) and shooting-range control systems (range management/operation), plus turning-target and target-retrieval systems for fixed and deployable military/LE ranges

[Confirmed — vendor's own product pages] — https://theissentraining.com/company/, https://theissentraining.com/military-training-systems/

Usage context

purpose-built, low-volume B2G/B2B range-control and target-scoring hardware for military/LE training facilities, not consumer or general enterprise networking gear [Likely] — https://theissentraining.com/military-training-systems/

Security context

no public CVEs, NVD, or CISA advisories found for Theissen Training Systems or its range/targetry products as of 2026-07-10; absence of findings is not itself a security-posture claim, consistent with a niche defense-market vendor with low public research exposure

[Confirmed — search performed, no hits] — no CVE/NVD/CISA record found

Ambiguity note

single vendor slug represents two related-but-distinct legal entities (US Inc. and German GmbH) with separate OUI assignments; no prior this site's own enrichment records record existed to disambiguate further [Confirmed] — the IEEE MA-L registry