Here you go:
http://www.airlinecodes.co.uk
They have all the information like airlines code, airport code and all sort of aviation related codes you can find there...
But for airlines code, you have to search them by country... And they even have code of airlines which have since left us...
2006-10-15 20:37:49 補充:
On the website, you will be able to find both IATA/ICAO and other related informations...