Country codes never begin with zero. Country codes beginning with +26 are in or off the coast of southern Africa, but you need the next digit to specify which country.
+260 = Zambia
+261 = Madagascar
+262 = Réunion and Mayotte
+263 = Zimbabwe
+264 = Namibia
+265 = Malawi
+266 = Lesotho
+267 = Botswana
+268 = Swaziland
+269 = Comoros
(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, and many other countries use different prefixes.)
Country codes never begin with zero. Country codes beginning with +26 are in or off the coast of southern Africa, but you need the next digit to specify which country.
+260 = Zambia
+261 = Madagascar
+262 = Réunion and Mayotte
+263 = Zimbabwe
+264 = Namibia
+265 = Malawi
+266 = Lesotho
+267 = Botswana
+268 = Swaziland
+269 = Comoros
(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, and many other countries use different prefixes.)
The telephone country code for Vietnam is +84. The area code for Cao Bang is 026, or +84 26 in international format.
Country code +27 is South Africa. 027 or similar could also be a valid domestic telephone area code in several different countries.
The telephone country code for Zimbabwe is +263. The area code for Chinhoyi is 067, or +263 67 in international format.
026 appears to be a telephone area code, written in domestic format. It is impossible to know where it is without knowing what country 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.