This number was a robot call saying it was a final notice from the IRS and they were filing a law suit against me. I was to call 213-610-1302 immediately. No, I did not call the #!!!!!!!!!!!!!!!!!!!
Called, rang once and hung up before I could answer.
A little searching around shows about the same results, with a few people saying that it's a robo-call from some company trying to sell pharmacy cards and at least two people saying they check for call backs so as to find numbers to sell.