'Returns true if the current country is a NANPA country and the
national number begins with the national prefix.'

def _is_nanpa_number_with_national_prefix(self):

    return ((self._current_metadata.country_code == 1) and (self._national_number[0] == '1') and (self._national_number[1] != '0') and (self._national_number[1] != '1'))
