I am looking for a list of the largest mortgage companies, REO
companies and companies that handle distressed REO (real estate owned)
Asset Management.

I need company names, website addresses, physical addresses and phone
numbers to the loss mitigation/foreclosure departments.

REO Asset Management Companies are companies that facilitate the
liquidation of real estate that is typically returned to the mortgage
company through the foreclosure process.  To recoup their lossess,
they sell these properties.