IDFM (Ild-de-France Mobilité) in Ile de France (all networks), including urban rail and tram from SNCF, metro and tram from RATP and all bus operators (Keolis, Transdev, RATP, etc.)
Ineo (AVMS provider) in Amiens, Rouen, Rennes and Centre Essonne - for Bus network
SNCF: national level- for rail network
Sytral in Lyon - for bus, metro and tram network
Transdev in Montpellier - for Bus network
Lumiplan (AVMS provider)
Main used services are: Stop Monitoring et General Message plus Check Status, and some Discovery services
and comming: Facility Monitoring, Situation Exchange and Vehicle Monitoring
Publish/Subscribe and SIRI V2 is be used Ile de France and a lot of other regions.