The Multiple listing service, also known as the MLS, is a portal that real estate brokers can access to list properties, view local real estate data, and interact with other brokers. Most people recognize the MLS as the database that all realtors use to post homes for sale. The MLS can only be accessed by local licensed realtors, who pay a membership fee. There are over 700 MLS’s in the country and each multiple listing services is geographically based. Real estate listings should only be posted on the local MLS. Realtor.com acts as a nationwide collection of all properties listed on the 700 MLS’ around the country. The only way to get your home listed on the MLS is through a licensed broker who is a member of your local MLS.