Who called from 2021010010

How do I block it?

Called me about 5 times while I'm at work!! I answered once and said "hello".
No response. Get a life !!

Same thing here, same number, these people are a waste of human life, I will never understand people like this.

S T O P calling me for all of GODS LOVE!!! i'm not about to fight with you nor do i want to hear from you'z EVER AGAIN!! LEAVE ME ALONE ALREADY!! P L E A S E .......

I have had 4 calls from this phone. Tried to make out the name of who was calling but they had very thick accents. All I could understand was "Unied States Government ........."
Told them to stop calling but they kept calling. First 3 calls were a man and the last call was a woman.