I am not 100% positive on this, but if I remember correctly, the federal Driver's Privacy Protection Act (I believe that is what is called) has strict regulatio

I am not 100% positive on this, but if I remember correctly, the federal Driver's Privacy Protection Act (I believe that is what is called) has strict regulations on who can access what information based off a license plate number. In most cases you will, at minimum, need a private investigator license in each state you want access to that state's database. Even then many states have even stricter laws that limit the amount of information that is available directly to a individual. And even still many states do not offer direct access, meaning that you would have to go down to the DMV office in person, fill out an information request form, and get the information direct from them. Many of the databases you see online, while saying they provide complete information, offer limited information as well. You may check with a company like Checkr.com or GoodHire for more information. Both offer API access to their databases at a cost. But again, you have to have a valid and legal reason for accessing their API.