Multiple calls on the same day—never left a message. Found out it was some sort of energy efficient scam by calling back. Recognized that there were similar complaints about other numbers with the same 512-521-32** beginning. We thought the Do Not Call list was supposed to prevent this kind of thing—apparently not.
I answered, and it was a "pause call", so I hung up. What I mean by "pause call" is that if it's a robocall, when you answer there will be a short delay -- on the order of 1-2 seconds -- before the system responds on the other end. If I answer and the caller doesn't respond in about a half second or so, I hang up (unless I hear background noise, like kids playing, etc. -- not likely to be a telemarketer). Some of these robocall systems don't respond until you say "Hello" twice, which I NEVER do. Ever. Never.
The number 512-521-3268 calls my house phone everyday & doesn't leave a message. Receive the calls M-F from anywhere between 9am to 4pm (Central Time) & sometimes will call between 2-3 times A DAY!!!!