011 is the international access prefix for calls from North America (USA, Canada, etc.)
50 is the first two digits of a three-digit country code. You need the next digit to be specific: it is somewhere in the Americas, but it could be anywhere from the Falkland Islands (+500) to St. Pierre & Miquelon (islands near Newfoundland, Canada; +508).
The country code and area code of Changhua, Taiwan is 886, 47.
The country code and area code of ChillÌÁn, Chile is 56, 42.
The country code and area code of Asturias, Spain is 34, 884.
The country code and area code of Arganil, Portugal is 351, 235.
The country code and area code of Alava, Spain is 34, 845.
The country code and area code of Badajoz, Spain is 34, 824.
The country code and area code of Gelephu, Bhutan is 975, 6.
The country code and area code of Baghdad, Iraq is 964, 1.
The country code and area code of Gerona, Spain is 34, 872.
The country code and area code of Ane, Netherlands is 31, (0)524.
The country code and area code of Castelo Branco, Portugal is 351, 272.
The country code and area code of Alexandria, Egypt is 20, (0)3.