Who called from 2020110001

I am receiving several calls daily saying they are with U.S. Government.  This afternoon I was outside and when I came in I had a call from 202-011-0001, which I did not return.  My cellphone and house phone are registered on the no call list.
I am a 79 year old widow and I would classify this as harassment..

it is a scam to rob your money ,call your phone company and have the number blocked these are scammers,hackers

how do i get the phone company to block this number

Check with your provider.

call saying from federal gov for grant