For more information about the charge group a number is in, and what groups it is local to, find the first few digits in the following list:
01520 01522 015242 015243 015244 015245 015246 015247 015248 01525 01526 01527 01528 01529
If the number you are interested in is not shown, it is not a geographical number or is non-existent. Numbers beginning 01523 are used for Mercury radio paging.
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