The name of the title company will be part of your closing package of paperwork that you received. You will find their name, address and phone number on the summary statement. You can also locate your title insurance policy. The information will be there.
If you are trying to track them down because of a lost title insurance policy, do not worry about it. When you sell a property, you will have to provide the buyer with a new policy anyway and since the original sale is over 7 years ago, the first title company will not offer you any kind of discount if you use them again.