Rustico is right… It doesn’t matter if it is Redfin, SDLookup, Realtor.com, Zip… all of the third party agencies that list ANY MLS information get it via IDX. The MLS information BELONGS to each individual MLS association. The MLS associations sell a distilled version of the MLS listings to IDX. IDX is a third party provider of data to all independent on line conveyers of data. These third parties such as Redfin etc then take the IDX information put it in thier own presentation, add other information such as property history, pictures or whatever they want to add to it… and then they present it.
