They aren't licensed for any 700 MHz frequencies yet, and haven't even applied for them.
Here are the frequencies that are allocated for Chester County in Region 28. It doesn't mean they will be licensed for all of them, but this is what was drawn up in the regional plan.
769.53125
769.54375
771.18125
771.19375
771.55625
771.56875
771.88125
771.89375
772.23125
772.24375
772.63125
772.64375
773.48125
773.49375
773.90625
773.91875
774.38125
774.39375
774.63125
774.64375