Fairfax Mortgage Investments, Inc. Mortgages Fairfax Mortgage Investments, Inc. Visit Website Request Info PO Box 1423 Bethany Beach, DE 19930 (302) 541-5363 (302) 261-0261 (fax) About Map About Your local neighborhood lender at the beach! What's Nearby? Distance: 5 10 15 20 25 50 mi.