Make a phone call to London

The country code of UK is 44.

The area code of London is 020.

The steps to call to London:

1. Dial the international call prefix or dial out code. To see what is the international call prefix of your country, visit List of international call prefixes – wikipedia.org for reference. The international call prefix indicates that the call is an international call.
2. Dial the country code of the United Kingdom, which is 44. At this stage the call should be the international call prefix followed by 44.
3. Dial the area code of area code of London which is 020. If calling internationally, the leading “0” of the area code is removed. At this stage the call should be  the international call prefix followed by 44 and then 20.
4. Now dial the local London phone number, if it is a mobile phone number and it begins with a “0” then the leading “0” is removed.

To make a call to London:

The international call prefix + 44 + 20 + local phone number (remove the leading “0” from mobile number”)