Trimble Railway GmbH
- Korbacher Straße 15, 97353 Wiesentheid
- +49 (9383) 9732-0
- +49 (9383) 9732-10
Arsenal Railway Certification GmbH
- Am Spitz 3/6/9, 1210 Wien
- +43 (1) 2580112
- +43 (1) 2580112-10
RMM RailwayMechanicsMetal GmbH
- Friedrich - Ebert - Straße 20, 15234 Frankfurt (Oder)
- +49 (335) 4000010
- +49 (335) 4335530
OpenTrack Railway Technology GmbH
- Gubelstr. 28, 8050 Zürich
- +41 (44) 31019-90
- +41 (86) 04431019-90
Railway Competence and Certification GmbH
- Waagner-Biro-Strasse 125, 8020 Graz
- +43 (316) 228454
- +43 (316) 228454-15
comlet Verteilte Systeme GmbH
- Amerikastr. 27, 66482 Zweibrücken
- +49 (6332) 811-303
- +49 (6332) 811-315