011 is the international outbound dialing code for the USA, Caribbean and Canada.
+1 is the inbound country code for the same area.
However, 011 1 is an invalid code. Within North America, just dial 1+area+number. Outside North America, dial your international outbound dialing prefix, followed by country code +1.
The nearest possibly valid code would be 0011 1, which is the dialing prefix for North America when calling from Australia.
(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.)
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.