00 is not part of the telephone area code, it is a commonly used international access prefix. You are thus asking about telephone country code +50, which is an incomplete code; you need one more digit.
Telephone country codes never begin with zero.
Telephone country code +85, dialed as 00 85 from many places, is an incomplete code somewhere in eastern Asia. You need one more digit.
Telephone country code +5, dialed as 008 5 from many places, is an incomplete code somewhere in the Americas. You need one or two more digits.
To reduce the possibility of confusion, it is best to quote an international telephone number beginning with the single plus symbol and the correct telephone country code (for example, +852 or +55), 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 is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
This is an incomplete international dialling code.
0085 Who Country code
Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
There is no 909 country code.
There is no telephone country code +897, nor +89, nor any other country code beginning with +89. There are no valid telephone numbers beginning with +89.
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.