Called 1/9/15. Caller ID showed phone number. Robocall something about a site inspection .. we hung up.

UPDATE: possibly related to 415-234-9981.

415-506-8083 called several times. We never answered. They never left a message. Yesterday (1/9/15) we answered. Robocall recording about an alleged site inspection. We hung up. BUT now they know our number is valid (& that we're stupid enough to answer unknown callers - D'oh!).

This morning (Sat 1/10/15), 415-234-9981 called for the first time. They called 3 times & left 3 robocall voicemails (computer simulated voice) claiming to be "Officer Julie Smith from IRS".

Robocall.  Hangs up no matter who answers.  Calling back results in this message: http://doorbell.net/junk/132602stimulus_grant.mp3

"If you are a U.S. citizen or a legal resident of this country with a business that has existed for one year with current revenue, you likely have a strong claim to a national business grant.  Please leave a message if you would like one of our moderators to get back to you."

CID says "NOVATO        CA"

I don't answer out of area calls...that's what voicemail is for. Blocked.