Country code +1 (dialed as 00 1 from many places) is North America (USA, Canada, etc.), but you need the following three-digit area code to narrow down the location.
+1 561 = Palm Beach, FL, USA;
+1 562 = Long Beach, CA, USA;
+1 563 = Davenport, IA, USA;
+1 566 = "personal" numbers in the USA;
+1 567 = Toledo, OH, USA
(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 Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
There is no country with the country code 0016. Country codes usually consist of 2-3 digits.
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.