where is 120 area code
The 120 area code is not located in the United States. The 120 area code is actually a country code for parts of Nicaragua.
You can check out where is that area code located thru http://www.phonecodearea.com .
Just go to http://www.checkphonedetails.com/ and you can find where 120 is located.
You can trace it thru the help of http://www.getmycaller.com/.