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I am looking for official/reliable regexps to extract sector/district/areas from a UK postcode. I have found a few online but I am not sure how good they are, and I have not a way to test them properly. Do you know any of those regex that can be considered valid?

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/^(((([A-Z][A-Z]{0,1})[0-9][A-Z0-9]{0,1}) {0,}[0-9])[A-Z]{2})$/

This matches, in order:

  • Unit Postcode
  • Postcode Sector
  • Postcode District
  • Postcode Area

I have a page on my website which addresses postcode format and using regular expressions to parse a post code into it's constituent parts.

  • I am using exactly the same regexp at the moment, that I got from another website – Randomize Sep 27 '18 at 10:30

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