Telephone country codes never begin with zero.
Country code +212, dialed as 00 212 from many places, is Morocco, including the disputed territory of Western Sahara.
Country code +1, dialed as 002 1 from many places, is North America (USA, Canada, etc.). You need the three-digit area code (i.e., two more digits) to narrow down the location any farther.
To avoid confusion, it is best to write an international telephone number in correct international format, beginning with the plus symbol and the correct telephone country code (e.g., +212 or +1), omitting any dialing prefix.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is00, but North America (USA, Canada, etc.) uses 011, Japan uses010, Australia uses0011, and many other countries use different prefixes.)
The dialling code 0012 is associated with the international telecommunications service for calls to the United States and Canada. It is primarily used for calling from countries that follow a specific numbering plan. However, it's worth noting that the actual country code for the US and Canada is +1.
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.