SD Realtor, zip is county based, so the listing is countywide. the discripancy between its numbers and the MLS numbers is the inclusion of land parcels for sale and MFR where as MLS just has SFR vs. Condos.
I don’t think ziprealty listings are exclusive to them and not appear on the mls, after all, I sold my condo with ziprealty and the buyer had his non-zip realtor.
when I was in OC I saw a lot more cases of “exclusive listing” say with Prudential that can not be found on ziprealty. but not so the other way around.
