Good thing to ask early. The federal rules (TCPA and the national DNC list) apply everywhere, but a few states are stricter. Florida, Oklahoma, and Maryland have their own mini TCPA laws, and some states have tighter calling hours. What usually matters is where the seller lives, not where you're calling from. Scrub every list against DNC, keep texts to normal hours in their time zone, and make opting out easy. If you're texting at volume, an hour with a TCPA attorney is cheap insurance.