I let the machine pick up, they didn't leave a message.  First time they've called.

Same thing here... called one time so far and left no message

Also the same for me, tonight at 840pm. One call, no voicemail.

Got a call tonight on my newly purchased cell phone; answered it, but they hung up right away.  I looked up the number out of curiosity.  I don't owe anybody anything, and just moved to California.  I would think no one should be contacting people on their cell; I thought that was illegal.  If given the chance, I would have told them they had the wrong number, but now, I wonder if they'll call again and again, since they didn't bother to check.  If they call again, I plan to block.

Called me twice in one week, hang up, no message.

Called back, and it's an office for LendingTree.com. Did business with them recently so it seems legit.