The Multiple Listing Service of Long Island, Inc. (MLSLI), is a computerized network of more than 2,400 cooperating real estate offices, located across Nassau, Suffolk and Queens counties. Within this service, thousands of professional REALTORS®, both owner brokers and their sales associates, share listing and sale information, and work together to serve the buying and selling public. MLSLI is a wholly owned subsidiary of the Long Island Board of REALTORS®.