Who called from 3212740639

Does anyone know who this is????  We are on the DNC list for our home and cell #', but we still get sales and collection calls...especially for other people.  How can we get this harassment to stop?

I get this number coming up on the caller ID several times a week and I am also on the DNC list.
They never leave a message so I have no idea who they are.
Can anyone shed some light on this?

The guy says he's collecting for the Shriners Circus.

soliciting local businesses for crippled children circus money