This happened to me today too!  What the heck!

Called and said he was "Jason" from Remax wondering if we were planning on selling the house in the next year.......

called, no message

don't appreciate the constant calls with no reply ....STOP CALLING ME!

Called and also left no message

Phone rang 4 times, then person hung up before answering machine kicked in. Rang long distance though it's a 905, so must be from Mississauga 905-area. I'm blocking this number, as per the feedback above, because I average 5-6 calls per day from this and other unknown-name numbers (which are usually rude telemarketers).