MRIS, Metropolitan Regional Information Systems, Inc., owned by 25 Shareholder REALTORÂ® Associations, is the premiere online real estate information service for nearly 60,000 real estate professionals located throughout Maryland, Washington DC, Northern Virginia, and parts of West Virginia and Pennsylvania. Headquartered in Rockville, Maryland and founded in 1993, MRIS operates the largest multiple listing service (MLS) in the nation.
HomesDatabase is an online real estate listings site produced by the Metropolitian Regional Information Systems–a Multiple Listing Service (MLS).
Unlike Zillow and Trulia, MLSs have all the real estate listings, but have been terrible at creating public-facing services. This site attempts to change that.