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:
01260 01261 01262 01263 01264 012652 012653 012654 012655 012656 012657 012658 012664 012665 012666 012667 012668 01267 01268 01269
If the number you are interested in is not shown, it is not a geographical number or is non-existent.
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