You need one more digit.
+290 = Saint Helena and Tristan da Cunha (UK territories in the Atlantic)
+291 = Eritrea (East Africa)
+297 = Aruba (Caribbean)
+298 = Faroe Islands (Danish islands between Scotland and Iceland)
+299 = Greenland
Telephone country codes never begin with zero.
Country code +29, dialed as 00 29 from many places, is an incomplete code for one of the following countries:
+290 - St Helena and Tristan da Cunha (Atlantic islands near Africa)
+291 - Eritrea (Africa) +295 - discontinued (was assigned but never used for San Marino, now +378)
+297 - Aruba (Caribbean)
+298 - Faroe Islands (North Atlantic)
+299 - Greenland
Country code +9, dialed as 002 9 from many places, is an incomplete code for a country in Asia, or for a transnational telephone service. For example, +91 is India and +979 is used for international adult premium telephone services.
To avoid confusion, it is best to write an international telephone number in correct international format, beginning with the plus symbol and the correct telephone country code (e.g., +291 or +91), omitting any dialing prefix.
(The plus signmeans "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.
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.
Niue is country code +683.
Fiji has telephone country code +679.