What Airlines does AirlineFlightInfo work for?

FlightAware AeroAPI
1

The docs for AirlineFlightInfo say “This information is currently only available for some carriers and flights.”

Could you post or direct me to a list of the airlines currently supported by this API? I am only interested in the seat count functionality (i.e. the seats_cabin_business, seats_cabin_coach, seats_cabin_first) fields - none of the other fields are of interest to me.

Also, is there any way to get the number of seats in premium economy? Are they rolled into coach or business or disregarded?

Thanks!

EDIT:
I’m specifically asking about the v3 beta: AeroAPI ✈ Version 3.0 - Flight Status API / Flight Tracking API / FlightAware API - Commercial Services - FlightAware

2

This feature will work for the majority of commercial airlines. Some scheduled cargo flights are also reported, but will not contain any seat information.

Different grades of economy aren’t represented in the published schedules. So advertised options (Basic, Plus, Leg Room, etc) are all reported as coach.