Who called from 3212046472

I have received multiple calls from this number.  They do not leave a message. I do not know who it is.

Picked up the call and say hello but no answer and then line drops.

This is a sales call no doubt. Illegally calling a "do not call" number.

found a way to get more info without compromising my cell number further. Blocked the number on my cell but called from the office. When they call back and get a professional line they hang up and don't call back. It is clearly a sales call.

Calls several times a day. They do not leave a message