Got a phone call from this number. The caller left no voice message.

IRS Scam using autodialer.  They claim you own back taxes and will be arrested if you don't pay.  Carrier is ATT Mobility, report abuse to abuse@att.net.

I get multiple calls with different phone numbers either saying it is the IRS or call back immediately in regards to a case file. This is a major scam, they change their numbers to avoid getting caught.