Who called from 3301120000

Scam call from someone trying to switch my electric supplier.  Uses a fake phone number and didn't know what electric company i use.

A National Holiday, but the scammers won't take a day off!  Called this morning while we were out.

Did not say anything, but called more than once

This number keeps calling several times a day no one on other end

Another SCAM call from a boiler-room operation trying to get me to switch electric suppliers.  Uses a fake number and doesn't know what electric company I use.  I said no, and he hung up.  Last time, the guy argued for awhile.  I don't understand how they spoof numbers, and I don't understand WHY they use such obviously fake numbers.