Who called from 9802658604

Received  recorded female voice message claiming call was from IRS. Was told the IRS was filing a suit against me and I needed to call 202-864-1219 for instructions.

I have gotten approximately 4 messages from this number, all left on my answering machine. A male voice asks for me by name, "Is Lucy there?" there's a pause, and the line disconnects. I haven't spoken to anyone directly as they call about the same time every day, which is before I get home from work.

This number has called everyday on my machine, 2x's a day, ask for a person, then says "Hello?" and hangs up.  idk who it  is.

caller asked for my mom at least 3 times a day

Same here.  They've called once every other weekday for the past week.  Called the number today, and received an out of office message that they were "assisting other patrons".