International telephone country code +1 is North America, including the USA, Canada, and some islands in or near the Caribbean. However, there are no valid numbers beginning with +1 1, let alone with +1 11.
No such telephone country code. Telephone country code +1 is North America (USA, Canada, etc.), but there are no valid numbers beginning with +1 0.
(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.)
There is no telephone country code +100 or +10, and there are no valid international telephone numbers beginning with +100 or +10.
There is no telephone area code 101 in North America (USA, Canada, etc.). Telephone country code +1 is North America, but +1 01 is also invalid. Telephone area codes in North America never begin with 0 or 1. There are other countries that may have a domestic telephone area code 101 or similar, but it is impossible to know which one you're asking about.
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.