A handy free directory assistance number is (800)FREE-411. This number will get you both residential and business numbers, but you will have to listen to a short ad before getting the number you need.
It used to be that these stores would honor a 10% military discount on special holidays, but now they have extended that courtesy every day! Please read article for more information, and to find out what you need to do/be prepared with to get the discount. http://themilitarywallet.com/home-depot-lowes-10-military-discount/