Who called from 3120000000

got a call from "312" the other day. Just "312" - no other numbers showed the caller ID. I took the call and it was some automated survey - I don't even know who. They just wanted to ask some questions about my experience with something that they didn't identify. I hung up.  Got another call today from "312" but there was no one there was silence when I answered.

I keep getting calls from the number 312. They keep calling 3 hours at a time. Does anyone know the number or how to block it on an iPhone 3GS?
I'm afraid to answer it because I read that it was a scam?

got another  just a dail tone. i am sick of these people calling

I too have gotten these calls.  Please file a complaint with the FTC here:

https://complaints.donotcall.gov/complaint/complaintcheck.aspx

This will ensure that the company is investigated, fined, and stopped.

I'm on the DO NOT CALL list also and I think it is THE source for all this crap!!!  I've also filed numerous complaints with the FCC and they do nothing.  The entire administration is nothing but a scam!