Telephone country codes never begin with 0, and +50 is an incomplete code. You need one more digit. See the related question.
The telephone country code for Zimbabwe is +263. The area code for Shangani is 050, or +263 50 in international format.
The telephone country code for Vietnam is +84. The area code for Dak Lak is 050, or +84 50 in international format.
The telephone country code for Italy is +39. The area code for Firenze (Florence) is 055, or +39 055 in international format. Note: unlike most countries, you DO NOT drop the trunk prefix 0 from the Italian domestic area code when putting the number in international format.
Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
Country code +57 is Colombia.
Country code 52 is Mexico.
Fiji has telephone country code +679.
Gibraltar is country code +350.
Moldova is country code +373.
Slovenia is country code +386.