I need mapping list between ICAO and IATA code , help !

Dear

i can,t search the result if the flight ID type is IATA, when i use the flightaware API to get the flight infomation,
Could provide me the full mapping list between ICAO and IATA code .
Thank you very much.

We have a list of airlines/operators available from here flightaware.com/commercial/data/operators

Or you can find some other resources online, such as Wikipedia