The telephone country code for the United Kingdom is +44, and London's area code 020 becomes +44 20 in international format. The local number is a further 8 digits in all cases.
To call London from Cameroon, dial:
Cameroon is telephone country code +237, with 8-digit national numbers. It does not use area codes, as such.
(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 zip code for Bafoussam, Cameroon is 00237.
The airport code for Douala International Airport is DLA.
There is no telephone area code 185 in Russia.
The telephone country code for North America (US, Canada, and several island nations and territories in or near the Caribbean) is +1. The plus sign means "insert your international access prefix here." The international access prefix from Cameroon is 00, so to call the US, dial 00 + 1 + area code + number. (To call from the US to Cameroon, dial 011 + 237 + number.)
No, telephone area codes are discrete data.
The telephone country code for Zimbabwe is +263. The area code for Beitbridge is 0286, or +263 286 in international format.
Telephone country code +93 is Afghanistan, and area code +93 25 (Afghan domestic telephone area code 025) is the city of Logar, south of Kabul.
The telephone country code for Zimbabwe is +263. The area code for Karoi is 064, or +263 64 in international format.
The telephone country code for Zimbabwe is +263. The area code for Chakari is 0688, or +263 688 in international format.
It has the area code 082.
Area code of Banepa is 011
The telephone country code for Zimbabwe is +263. The area code for Glendale is 0376, or +263 376 in international format.