The Republic of Guinea (capital: Conakry) is country code +224.
Equatorial Guinea (a separate country) is country code +240.
Guinea-Bissau (another separate country) is country code +245.
(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.)
The Czech Republic is country code +420.
Republic of Guinea.gn is the Republic of Guinea, in western Africa, not to be confused with Guinea-Bissau or Equatorial Guinea.
The Turkish Republic of Northern Cyprus is a self-declared state, recognized only by Turkey. It uses Turkey's telephone country code +90, with the telephone area code +90 392.
Guinea uses .gn for an Internet top-level domain.
There is no such thing as a "country zip code." The international telephone country code for the Republic of South Africa is +27.
.gn is for the Republic of Guinea in western Africa
The three-letter country code for passports issued by the Republic of Ireland is IRL.
Country code +86 is the People's Republic of China.
Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
The country code and area code of Famagusta, Cyprus- Republic of is 357, 23.