I am trying to find the parent corporation name Tiger Plaza Apartments in Baton Rouge. I need to contact their parent company's customer service and I cannot find any info directly from the apartments themselves. Isn't there a search engine to find out information like this? Shouldn't there be a public record of this information available to consumers?

You could try the Tax Assessor's or Auditor's Office at the County and ask them just who pays the taxes on that property. It is probably listed as a corporation name. Then you can contact the Secretary of State, Division of Corporations at your state and ask them for the phone number and address of this corporation if the Auditor's office does not have an address (they usually do).