Who called from 2021425495

I am receiving repeated harassing calls from 202 numbers and this one had a ridiculous person on the other line that said to me "who the hell are you?" I called back and no dial through.

Mine was saying it was from the federal grant department that I had a grant of 7000 being rewarded to me. Scam?

I keep getting calls from this number for my minor son. And when I tell them, they yell at me and hang up

I have a stupid phone so can't identify them as spam... so I just set their number as a contact in my phone and set the ring tone for that number to NONE.  Subsequent calls from them show up on my call log as missed called, but at least they don't interrupt me because the phone doesn't ring.  Whoooopeee!!!  What the sam hill did people do in this world before phones -- oh, yeah, they had to get a REAL JOB!!!