I've received multiple calls from this number and when I say "Hello" they hang up.
When I tried to call back my service would not connect me as the call can't be "completed as dialed."
I'm guessing this is another malfunctioning political robocallbot.
Or it's a spoofed number being used by fake IRS agents, who use a lot of numbers in the 202 area code.
They keep changing the number because callblockers answer and hang up on them.