I just received a call from this number with a pre-recorded message.  The message said that they were the internal revenue service and they were calling to inform me that the internal revenue service was filing a lawsuit against me and that I needed to call them back at this number.

Received a recorded message from this # saying I needed to call them as they were about to process a lawsuit against me.

I just received a voicemail with robot-voice, pre-recorded message stating there was an arrest warrant out for me and to call them at the number above.

I received a pre-recorded message stating that the IRS filed a lawsuit against me and to call back to hear the details regarding allegations and "next steps".