I received a call in the middle of the night from this number and I don't answer call from numbers I don't know I sent a text an it didn't go threw.

I suspect you've misreported a Grenada number, one of many in the neighborhood which should not be dialed out of curiosity unless you like packing your phone bill with heavy international fees. Here's yours, followed by nearby numbers in the same exchange which have rapidly attracted similar complaints:

http://800notes.com/Phone.aspx/1-473-520-9738
http://800notes.com/Phone.aspx/1-473-520-9733
http://800notes.com/Phone.aspx/1-473-520-9734
http://800notes.com/Phone.aspx/1-473-520-9740
http://800notes.com/Phone.aspx/1-473-520-9757
http://800notes.com/Phone.aspx/1-473-520-9765
http://800notes.com/Phone.aspx/1-473-520-9781
http://800notes.com/Phone.aspx/1-473-520-9783/2

One-ring calls from Caribbean countries
http://800notes.com/forum/ta-912f003c27d0648/ ... bbean-countries

473 AREA CODE WARNING
http://800notes.com/forum/ta-91e20993bc3aa22/ ... m-473-area-code

Don't answer or call back to this number. The news is all over it tonight.