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Postcodes are exclusively created and maintained by Royal Mail.
They are a sorting and routing instruction for Royal Mail to deliver items of mail quickly and accurately. Royal Mail will only allocate a postcode once they have been notified by the council of a new postal address.
Copies of our new address documents are sent to Royal Mails Address Management Unit who then allocate postcodes.
After Royal Mail allocate a postcode they add the new postal address into the ‘Not Yet Built’ file (NYB). Only when a new property is built, occupied and can receive mail will Royal Mail update the address from the NYB file to the 'Postcode Address' file (PAF).
You can contact Royal Mails Address Management Unit on 03456 011 110 to update an address from NYB to PAF.