MPP.com – Mechanical Protection Plan | Vehicle Extended Warranty Coverage The Mechanical Protection Plan® provides the financial strength and stability of one of the industries most respected service contract insurers and administrators. The Protection Plan® is backed by Old United Casualty Company, an A Excellent rated domestic insurance company by A.M. Best Co. The Mechanical Protection Plan® is administrated by MPP Co., Inc., an affiliate of Old United Casualty Company Mppprotect.net~Site InfoWhoisTrace RouteRBL Check