Country codes never begin with zero. Country code +213 is Algeria.
(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.)
International country code +20 is Egypt. All Egyptian mobile numbers begin with +20 1, but there are also some landline codes that begin +20 1.
(011)(632) 427-0213
Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
The telephone country code 909 is assigned to the United States. Specifically, it covers the state of California, including areas such as San Bernardino County, Riverside County, and parts of Los Angeles County. This code is used for incoming international calls to these regions and is part of the North American Numbering Plan (NANP).
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.