What does aircraft model number mean?

Hello, maybe answer is somewhere here but i couldnt find. My question is:

We know A319-100, A320-200, B737-800 etc, but if i look at a fleetlist, i will see A319-132, A319-112, A320-232, B737-8F2(WL) what are 32, 12, F2 etc? What do they mean? Is it about engine? Seats?Or what?

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They’re designated by the airlines.

Customer codes for Boeing. Engine codes for Airbus.

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If you scroll to the very bottom, it provides a table:

I assume google can help you with similar variants on different models.

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Boeing is customer codes:
747-436=747-400 to British Airways
777-224=777-200 to Continental
777-222=777-200 to United

Better Airbus code list:

Airbus codes are AAA-XYZ

X=Airplane model-100/200/300/500/600/800/900/1000
Y=Engine manufacturer
Z=Engine thrust rating

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For Airbus, engine codes; for Boeing, customer codes.

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Thanks a lot everyone.

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You’re quite welcome!

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