In most cases the title company that closed your loan is the agent for the title insurance company, and can be contacted regarding insurance issued on your property.
Contact the Agency that issued the title insurance at time of closing. If an Owner's Policy was paid for, they should have issued you an actual insurance policy, complete with a Title Jacket and Policy Number. If you never received this and paid for one, request an original or a certified copy of it.
The Policy will reference the title UNDERWRITING COMPANY that is insuring the Policy. ie: First American, Stewart, Chicago,etc. That is who the actual COMPANY. The agency only acts in behalf of the Underwriter and is not the actual insurer.