We called the # back and it appears that it's a scam.  Walmart gift card for you....

201-351-7748 calls every other day and doesn't leave a message.  My phone number has been on the DO NOT CALL list since I can remember.  Annoying

The Do not call list is a sad joke.  I have my phone number there too, and although it worked for about a year, or two, I now get more telemarketing calls than ever!  I think these phone harassers get numbers off that list.  I now have call blocking  and these calls will never, ever get through with their scams and harassing techniques!  They waste their time!

Got a call from this number, when I asked who it was they remained silent.  Weird.

called 3xs now at dinner time. heavy accent trying to sell ( I mean Scam) something. The last time they were silent and hung up. Comcast should be ashamed charging for there phone service without the ability to block more than 12 unwanted thieves. This is the current tidal wave of phone cheats that ignore common decency to prey on anyone with a phone# without regard for ever getting caught or prosecuted.