I answered a call from this number.  A computer voice said, "Good-Bye", followed by a hang up.  It's safe to block this number.

They called and left no msg.  I called back and a recording said the number you called is not in svc.  Strange!

Called my cell, left no message. Adding to reject list, thanks to previous posts. 650 area code is San Francisco Bay Area (semi-local to me), in case that means anything.

Call back and his phone not in service, be aware of this scammer !!!

Called cell phone and stated they were General contractor working in San Jose srea.  Could not provide company name.  Some vague assertion that they were downtown San jose "near the fire station".  Pretty obviously some call center chewing through numbers for cold calling.  Also pretty obvious they don't heed the do not call list.  Caller ID looks faked (number not in service).  Who would actually do business with anyone with this business model!?  Not me.  Guy on the phone was nice enough, and mentioned they'd put me on their do not call list...  How nice though, given that I'm already on the national DNC list and they called a cell phone number.  Ticks me off!