Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
Gibraltar is country code +350.
Moldova is country code +373.
Slovenia is country code +386.
Togo is country code +228.
Liberia is country code +231.
Angola is country code +244.
Mozambique is country code +258.
Niue is country code +683.
Fiji has telephone country code +679.