There is no such area code as 0203. It does not exist. London is 020 with an eight digit local number. The 3035 block of numbers is allocated to Plus Telecom Ltd; and may very well be for VoIP connections. The number should be written ( 020 ) 3035 XXXX.
The telephone country code for Zimbabwe is +263. The area code for Mashava is 035, or +263 35 in international format.
The telephone country code for Ghana is +233. The area code for Techiman is 035, or +233 35 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Techiman number of the form (0653) XXXXX changed to (035) 25X-XXXX.
The telephone country code for Ghana is +233. The area code for Berekum is 035, or +233 35 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Berekum number of the form (0642) XXXXX changed to (035) 22X-XXXX.
The telephone country code for Ghana is +233. The area code for Yeji is 035, or +233 35 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Yeji number of the form (0568) XXXXX changed to (035) 27X-XXXX.
The telephone country code for Ghana is +233. The area code for Wenchi is 035, or +233 35 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Wenchi number of the form (0652) XXXXX changed to (035) 24X-XXXX.
The telephone country code for Ghana is +233. The area code for Sunyani is 035, or +233 35 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Sunyani number of the form (061) XXXXX changed to (035) 20X-XXXX.
The telephone country code for Ghana is +233. The area code for Dormaa Ahenkro is 035, or +233 35 in international format. The local number is always 7 digits. Almost all telephone numbers in Ghana changed in 2010. An old Dormaa Ahenkro number of the form (0648) XXXXX changed to (035) 23X-XXXX.
The telephone country code for Ghana is +233. The area code for Brong Ahafo province is 035, or +233 35 in international format. The local number is always 7 digits.
If this is a LONDON, UK, telephone number then the correct format for the number is: (020) 3xxx xxxx These are new London numbers issued since 2005. There is no 0203 area code. London is (020) with an eight digit local number. London has just one area code (020), and all local numbers have eight digits.
020 is London. 020-3 numbers can be anywhere in London. The operator who "owns" this number is Frontier Systems. Note that the area code for London is just 020, not 0203 or 0207 or 0208.
In the UK, telephone area code 020 (+44 20 in international format) is London, and there are some numbers beginning with 020 33, but the 33 is the first two digits of an 8-digit local number. In Germany, area code 0203 (+49 203 in international format) is Duisburg. There are many other countries where 02033 or similar could be a valid domestic telephone area code. Telephone country code +20 is Egypt, and +20 3 is the area code for Alexandria.
If you're in the UK, area code 020 is London. The '3' is the first digit of the local number, not the last digit of the area code.