What if your builder has not given you a lien waiver for a sub, can I call the sub and find out if they have been paid
Assuming you are the Owner, then Yes, you can contact a subcontractor to confirm whether they've been paid and how much.
And if you think there may be other subs or suppliers who haven't been paid, request your contractor provide you with a Sworn Statement. This is a list of all of the contractor's subcontractors, suppliers and laborers, which should include phone numbers, what they are furnishing, their contract amount, paid to date amount, amount the contract plans to pay them, and an amount left to complete on their contract.