I'm getting calls from a similar number and I found this info on the web:
http://www.wtng.info/wtng-374-am.html

The 374 area code appears to be from Armenian cell companies.

Hope this helps!

same here?! they call once every day and when you answer knowone there

the same thing is happening to me.  It's annoying.

There is never anyone on the line when I answer.