where does this phone number originate from 1-800-379-8495?

Answer 1

Mary, I think it is google.

Answer 2

Could be from any country using the North American Numbering Plan.  

Most likely, its a US or Canada number.

Toll Free numbers are non-geographic, so its impossible to tell.

Answer 3

It could be anywhere in the US. 

Look it up via Google and hope for the best.