Who called from 5168000000

i get 3 to 4 calls a day from this number. just to stop the ringing i pick up and hang up immediately

I just got a call on my cell from 516-800-8000 claiming to be from Microsoft as well. I'll report them once I get to the house

Windows Tech Dept.
UTS
Claims callback number is 235-065-2100
Brian Bwane
Employee ID# 8600650
Global Routing System reports infected files
Number on caller ID is 516-800-0000

call at all times, sometimes as late as 9pm. I am on the do not call list

Called probably 20 times in the last month