This is what I read:
FlightAware sometimes suggests that I use a metro area or terminal area for my searches rather than an airport code. What other cities or terminal areas can I use for areas with multiple airports? (Back To Top)
Please consult FlightAware’s list of terminal areas and feel free to use them when appropriate.
I tried ZNY and ZMA and so on, but I got this answer:
Unknown or Invalid Airport Code
Hint #1: Airport code must be a 3 or 4 digit ICAO (e.g., AUS/KAUS) or FAA (e.g., 3R9 or CA35) code.
Hint #2: IATA codes are not currently supported (i.e., Tokyo/Narita’s ICAO code is RJAA, not NRT or KNRT).
Is it possible to enter ‘center’ names or did I misunderstand Quote 1 ?