Coldwell Banker Alfonso Realty, LLC. Is the largest real estate company on the Mississippi Gulf Coast with 4 offices and more than 175 Sales Associates, providing full service for residential and commercial real estate. Coldwell Banker Alfonso has been recognized for more than 20 years as the #1 Coldwell Banker Company in Mississippi and received international awards for unprecedented client service following Hurricane Katrina. Competing against regional and international giants of the industry, Coldwell Banker Alfonso does more business in Mississippi than any other brokerage company. Since 1852, the Firm has worked hard to make homeownership a reality for Gulf Coast families and is dedicated to demonstrating the highest standards that are a hallmark of Coldwell Banker service.