First American Mortgage Address: 1000 Lake Saint Louis Blvd, O Fallon, MO 63367 Phone: (636) 561-3333 Hours: Mon: 9am-5pm Tue: 9am-5pm Wed: 9am-5pm Thu: 9am-5pm Fri: 9am-5pm Mortgages, Loans Other Businesses: Advance America at 1254 Bryan Rd., O'Fallon, MO 63366