Who called from 3128210220

My caller ID says "NRTHAMERASCFOOD"  This phone number calls my home 2 or 3 times daily.  They are not leaving a message?  I do not want to receive calls from this business.  How do I get them to STOP calling me?

Has called dozens of times. never once have they left a message and never once did I or will I answer their calls. Their Caller ID says CHICAGO IL

312 is a Chicago area code. However no idea who these idiots are who are calling 3 times today they called and never leave a message. I do not answer calls I do not recognize. and I also received an unknown caller last night at 21:36 which is past any type of solicited call according to the Federal Laws.

Leaves voice mail but nothing on it

No message just calls and hangs up