Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
The country code and area code of Feni, Bangladesh is 880, (0)331.
The country code and area code of Potsdam, Germany is 49, (0)331.
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.
Vanuatu is country code +678.