Answer:
Most properties that you find in the MLS database as a Realtor are also included in the IDX feed, but not all. Some brokers or agents who add their listings to the MLS database will “opt out” of showing those listings via IDX display, which means their listings will only appear to other Realtors – they are not available in the IDX feed. Usually the IDX feed includes over 90% of the listings found in the MLS database; but some areas have higher or lower percentages of opted-out properties.