You’ll be incredibly lucky finding any scammers on a US number, who are active at 3am eastern
I took out a popup scammer I had in my database who my system found active and online at 1am eastern
That was the only one of two I found, the other was a PCH clown who was robocalling his numbers out for the day
He was active on this number
5167806182 PCH James Morgan prize patrol department claim code 85647 PCH (active , answering and robocalling from this number right now)
Good luck !