Just received a call from 304-515-0898 while I was on my cell, so I didn't answer. No voice message left, and got the "call cannot be completed as dialed" error on trying to call back. My cell has been on the National Do Not Call registry for more than 3 years.
Just got the same thing as Roger, a call from (304) 515-0898, they did not leave a message and the number cannot be redialed. I also got a call from (918) 735-1265 earlier this morning who also did not leave a message. Sounds like a scam.
I received just 5min ago, the same numbers as MW! Just now, (304) 515-0898 and yesterday around 12:15pm, (918) 735-1265. Very annoying. Judging by everyone else here, the callers are "credit card" spammers trying to get involved with savings offerings. Just ignore.