To identify a geographic area, click on the first few digits of the code.

010 011
0120 0121 0122 0123 0124 0125 0126 0127 0128 0129
0130 0131 0132 0133 0134 0135 0136 0137 0138 0139
0140 0141 0142 0143 0144 0145 0146 0147 0148 0149
0150 0151 0152 0153 0154 0155 0156 0157 0158 0159
0160 0161 0162 0163 0164 0165 0166 0167 0168 0169
0170 0171 0172 0173 0174 0175 0176 0177 0178 0179
0180 0181 0182 0183 0184 0185 0186 0187 0188 0189
0190 0191 0192 0193 0194 0195 0196 0197 0198 0199
020 023 024 028 029
03
04
050 055 056
06
070 075 076 077 078 079
080 082 084 087
090 091
12 August 2008.

International Codes List
Redundant 00xx Codes List
All current telephone area codes (July 2005) prefixed 01xxx were formerly prefixed 0xxx.

London
01 was the area code for London.
The code was split into inner London 071 and outer London 081.
These codes were changed to 0171 and 0181. Both codes were consolidated into 020.
An 01-xxx xxxx number became either an 071-xxx xxxx or 081-xxx xxxx number (ditto 0171- and 0181) and today the original 01-xxx xxxx (if unchanged) will be either 020-7xxx xxxx or 020-8xxx xxxx.

The UK is divided into more than 650 telephone code areas. Telephone code areas are dialled using a 0 code before the area code. Local numbers can be dialled either with or without the combined trunk code and area code. Area codes can have between two and five digits after the 0 trunk code, and the local number part can have between four and eight digits. Most numbers have exactly ten digits after the initial 0 trunk code, but some areas have only nine digits. Longer local numbers have shorter area codes. The 0 trunk code is omitted when dialling the UK from abroad.

For printing lists of telephone numbers onto labels we recommend the range of address labels from Cloud Labels. They also supply templates that you can download in Word and PDF formats to help position the text.