I can usually tell if it's a charity number and this one raised a red flag the second I saw it, so I let it ring. Then I check online for this site or the should I answer site. LOL. I'll be barring this one along with the others I have on my phone.

Received calls from this number. When answered they just hang up.

its a fund raising charity , i missed this call and just rang them and thats what it said, :Fund Raising Charity:

I keep receiving calls from this number but when i pick up they just hang up, when i call this number back the operator tells me to check the number and try again??????

Me too.  many times over.