Aircraft Range - Quoted Figures

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Does anyone know if the quoted maximum range for an airliner (for example an A321neo has a quoted range of 3650nm at max load) is the actual furthest that the aircraft can fly or if an adjustment has to be made to take off contingency, reserves, diversion etc?

In other words can an A321neo fly for 3650nm before it goes into reserve fuel?

Thanks as always for any replies.