If the bookie in question doesn’t, you should keep your distance from it. Having a license from the relevant authority or not is what determines whether the online betting sites you are considering are legit or not. Before you learn how to bet on sports from your location, you first need to learn which the main license issuer is.
Of course that a single sports betting license will not be viable everywhere in the United States. New Jersey Division of Gaming Enforcement.Maryland State Lottery & Gaming Control Agency.