Who called from 6305160000

Scammers, foreign people, try to get you to use your computer so they can hack your information, they will catch em :)

Unknown number, doesn't leave voicemail

Received call telling me that my computer had been compromised and I needed to download a tool to fix the problem.

Yep, just tried the old "we are microsoft - you are having issues with your computer" bit.  Total scam.

Used a 636 and 630 area code the first from United States the other MO. Asked me.to go to my computer. I asked for.themnto rive me immediately from their call list, she (middle Eastern) got biligerent. They've called nine times.