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Ever wonder how American Airlines' flight numbers are divvied up, particularly amongst the various regional carriers who operate American Eagle flights? Here you go:
Mainline 1-2999
SkyWest 3000-3299, 4915-5014, 6240-6349
Envoy 3300-4249
Republic 4500-4914
PSA 5015-5679
Mesa 5680-5959
Piedmont 5960-6239
Keep in mind, these ranges may change slightly from month to month, but these are the latest.
