9F4M0000+ https://www.vbb.de
Schedule: GTFS
Real time departures: Custom API
Real time vehicle positions: Custom API
Alerts: Custom API
QR: needs mapping
http://qr.bvg.de/h224401
https://www.openstreetmap.org/node/1827009397#map=19/52.45679/13.57789
https://overpass-api.de/api/interpreter?data=node%5B%22ref%3ABVG%22%5D%5B%22gtfs%3Astop%5Fid%22%5D%2852%2E48225751022%2C13%2E302898406982%2C52%2E577810382728%2C13%2E484001159668%29%3Bout%3B%0A
zones do not represent ticket zones