the person said that they were calling about my "visa/mastercard" account which makes no sense. When I asked what they were referring to, they hung up. No idea who it was.

I got the same call, hung up on them, but he didn't sound like a professional telemarketer after I thought about it for a second.  That's when I googled the number and found this.

Same experience. When I call the number back, I get a number not in service message. I suspect this is some scam. My caller ID said the call came from 'Yoon Daihee'.  This name sounds as if it could be a personal name, perhaps Korean.

same number called me but it was really weird they asked if was home and when i said that i was who they wanted to speak to they hung up....