'00' isn't part of the country code, it is a commonly used international access prefix. Country code +93 is Afghanistan.
The reason it is important to remove the prefix is that there are some places that use '009' as the international access prefix, which would make 00936 a code for Hungary (country code +36).
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.
Vanuatu is country code +678.
Niue is country code +683.
Togo is country code +228.