If you do not know who your insurance company is, there are a few other options for finding out your insurance status such as:
If you cannot find the information in your email or bank statements, you should reach out to your Secretary of State. This may seem like an escalation, but the Secretary of State often maintains records regarding car insurance.
Finally, if the other methods are not successful, you can request a new car insurance quote. This may seem counterintuitive if you already have car insurance, but it is typical for agents to run a report that shows your current insurer and if your policy has lapsed or not.