Cameroon is country code +237.
(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 Union of the Comoros (Islands) is country code +269.
(Mayotte also used country code +269 until 2007, but now uses +262.)
(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 Republic of Congo (République du Congo, capital: Brazzaville) is country code +242. Landline numbers begin with +242 222; mobiles begin with +242 0. (Note that you do not drop the leading zero from the Congolese mobile number when calling from abroad.)
The Democratic Republic of Congo (République Démocratique du Congo, formerly known as Zaïre, capital: Kinshasa) is country code +243. Mobile numbers begin with +243 8 or +243 9.
The Democratic Republic of Congo (République Démocratique du Congo, formerly known as Zaïre, capital: Kinshasa) is country code +243. Mobile numbers begin with +243 8 or +243 9.
The Republic of Congo (République du Congo, capital: Brazzaville) is country code +242. Landline numbers begin with +242 222; mobiles begin with +242 0. (Note that you do not drop the leading zero from the Congolese mobile number when calling from abroad.)
The country code and area code of Brazzaville, Congo is 242, 28.
The country code and area code of Cuvette, Congo is 242, 21.
The country code and area code of Plateaux, Congo is 242, 24.
Telephone country code +250 is Rwanda, in Africa.
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.
Togo is country code +228.
Liberia is country code +231.
Angola is country code +244.