Got a call from this number to my cell (same area code). Call did immediate hangup when I answered. No message left.

This number called and let my phone ring once and immediately hung up before I could answer.
STRANGE

Robo call, spoofed number. Out of curiosity I called back, voicemail "identified" caller as offering a free $100.00 rewards card to one's favorite retailer. Still out of curiosity I hit 1 to be connected and a man with a HEAVY hispanic accent "William" (LOL) answered. It was a bit hard hearing him due to the boiler room din in the background. He identified the company as rewards center or some such and wanted to know my name. I hung up and blocked the number.

SCAM. Beware.