Milk kept at room temp duration

Gibbeanski
So I know freshly expressed milk can be kept at room temperature for about 4-6 hours, but I can't seem to find milk that has been in the fridge, taken out and warmed. For the milk that has been in the fridge (for one day), and warmed (submerging milk bottle in warm water), how long can it be kept out at room temperature? Is it still 4-6 hours?
TIA!