I have gotten calls from this number several times over the last few months.  Always shows up as UNKNOWN NAME on caller ID.  Never ever leaves a message (and I only answered the call from this # once, and they hung up when I spoke).  If it is Keller reality, I will make sure I never ever use them.

"Austin" from Keller Williams Realty - talks out of both sides of his mouth.   Hang up on this idiot.

called, left message, maybe 3 words, had to tell sound was very muffled

Called, answered and a recording said "good bye"...