Not all homes are listed on the all the MLS sites because it depends on which MLS service that agent/broker belongs to. Some belong to many MLS sites and some only one. If a realtor doesn't add it to the MLS - it will not show up on realtor.com either. Is it a particular house or just houses for sale in Rockaway. If a particular house - how did you hear of this house? I can send you the link for homes for sale in Rockaway. Send me an email.
(973) 228- 1000 ext 132