Hung up upon answering

Called 9am (saw on call display) but no message left

When I answered they hung up....could hear talking in the background like a call center.  No idea why they called here if they just hang up when someones answers?  

Thanks. This number has been calling my house, asking for me by name and then hanging up. Duck Blasters makes sense...I had called over a year ago for a quote.

left no msg.

Just got this call and it was from Duct Blasters wanting to give me an over the phone quote for getting my ducts and vents cleaned.