UK Phone Numbers - Dialling

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General Information
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All UK telephone numbers begin with a '0'. The most important thing to remember when dialling a UK number from outside of the UK is that the zero is omitted. For example if you were trying to dial 0871 222 1156 you would only dial 871 222 1156. Remember this applies only if you are OUTSIDE the UK, from inside the UK you dial the number in full. Ok so you know to drop the first zero from any UK number. The next step is to find the INTERNATIONAL ACCESS CODE for the country you are currently in. Lets assume you are in the USA. Using our access code list you will find the access code for the USA is 011. This means any international number dialled from within the USA to an international number must be preceded with 011. So for our UK example we now know 0871 222 1156 becomes 011871 222 1156 from the USA. But your not ready to dial yet. You have dropped the first '0', added the access code of 011 but you must still use the international dial code for the country you are dialling. Looking at our list you will find the international dial code for the UK is 44. This goes after the access code so our final UK number becomes 01144871 222 1156.
Remember all international numbers are dialled in the format:

You will however also find many examples of where the UK number is already displayed in an international format. For example you may see:
+44 871 222 1156
In this format you only need to add your own international access code. The 44 signifies the UK international code and the leading '0' has already been dropped.

London phone numbers all have an 0203, 0207 or a 0208 prefix (020 is the actual London code). Originally 0207 was assigned to inner London and 0208 assigned to outer London. However since 1999 both 0207 and 0208 prefixes have been used London wide without geographical significance. Since 2005 the 0203 prefix has also been used.
If you are calling within London to another London phone number then you can omit the initial 020 part of the number. Also when dialling from outside the UK you do not dial the initial 0. So from outside the UK an 0207 number would start 207 plus of course your international prefix code and the UK code of 44.

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