What are the largest MLS real estate listings in the United States? The table gives you the most updated list (10/31/2020), as well as links to their homepages, and their 2020 Membership numbers.
The National Association of REALTORS (NAR) is North America’s largest trade association for real estate helped set the general requirements for IDX and does a good job of coordinating the industry but the MLS space is a continually shifting landscape.
Feel free to bookmark this page for your resource of the top MLS’s in the country. We’ll continue to update it for you, so you have a single resource.
What is an MLS?
A multiple listing service (MLS, also multiple listing system or multiple listings service) is a suite of services that real estate brokers use to establish contractual offers of compensation (among brokers) and accumulate and disseminate information to enable appraisals. A multiple listing service’s database and software is used by real estate brokers in real estate (or aircraft broker in other industries for example), representing sellers under a listing contract to widely share information about properties with other brokers who may represent potential buyers or wish to work with a seller’s broker in finding a buyer for the property or asset. The listing data stored in a multiple listing service’s database is the proprietary information of the broker who has obtained a listing agreement with a property’s seller.
There is no single authoritative MLS and no universal data format. However, there is a data standard for MLS systems—the Real Estate Transaction Standard—which is being deployed across MLS solutions in North America. However, the Real Estate Standards Organization has been spearheading the industry’s move to use more modern data formats, standard data definitions/fields, and coordinate leading industry organizations to build a new future of real estate data.
Getting Your MLS on Your Real Estate Website
Each MLS in the U.S. are independent and offers direct data feeds to technology vendors via RETS and/or Web API. Our proprietary MLS aggregation technology connects your local MLS into our IDX engine and the most advanced home search available.
We deal with technology, so you do not have to, and we love geeking out on innovative technology that people use every day. How much do we love data and software people love? The Real Estate Standards Organization (RESO) wrote a case study on us, how our team helped build the navigation apps in your car and on your phone (pages 6 – 7, and Showcase IDX’s role in the real estate industry over the past 20+ years).
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