Who called from 6315550148

why are they calling?

This is a crime they want access to your computer

keep getting calls when i answer it hangs up

Do NOT answer (or call back) any number that is in the format (xxx) 555-0100 to (xxx) 555-0199.  These are the fictious numbers you hear on tv.  They don't exist.

Depending on your cell phone provider, calling them back will trigger fees for 411 (directory assistance).

I receive calls from all area codes with 555 prefix daily they never say anything when I answer