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.