Harrow Postcode Address List (HA)

Postcode Address File  

The very latest Harrow postcode address list for direct marketing and other applications including direct mail and data cleaning. This is the only official address database sourced directly from Royal Mail and provides you with every postcode and postal address in the Harrow postal area! 

The Postcode Address List or PAF file as it is otherwise known, is without any doubt the definitive most up-to-date and complete address database in the UK. There are two product options: the UK file which has every address and postcode in the UK (28 million addresses both business and residential) OR just the addresses in the Harrow postcode area, which is the cheaper more address specific and a smaller file.

Harrow HA Postcode Address List / PAF Applications

The Royal Mail Postcode Address File (PAF), is often used to capture, create and or maintain your in-house address lists pre mailing.  This includes web site registrations, forms and customer databases to reduce the number of returned or undelivered items from mailing programs.  Obviously there are many more applications that you can use the PAF file for including mailing, planning leaflet distribution, logistics, navigation to name just a few!


  • Clean addresses
  • Cheaper source as a mailing file
  • Reduce postage costs through Mailsort, Presstream and Cleanmail
  • Reduce the amount of undelivered mail
  • Preservation of brand image
  • Improved accuracy of customer and prospect analysis
  • Great for analysis
  • Perfect for grid referencing


  • Organisation Name
  • Department Name
  • PO Box
  • Building / House Name
  • Sub Building Name
  • Building Number
  • Thoroughfare
  • Street Name
  • Double Dependent Locality
  • Dependent Locality
  • Post Town
  • Postcode
  • Postcode Type
  • DPS
  • SU Organisation Flag (blank if residential)
  • Grid Reference (optional)


The Harrow Postcode Address List covers every known address in the Harrow Postcode Area (HA).  A sample of the PAF can be found by following the link at the top of this page, this will also provide you with the data fields that are provided for each record.


The PAF file is supplied as a Comma Separated Variable (CSV) delimited text file using double quotes by default. This field format will open very easily using almost any software application including but not limited to Excel, Word, Notepad, Access, SQL etc.  Due to the size of the file, older versions of Excel may not be an option as Excel limits any file size to around 65,000 rows / records.


The Postcode Address File (PAF) is by default emailed at the time of order using a secure download link delivery method.  If you require the PAF supplied in another format then we will be more than happy to accommodate you where humanly reasonable to do so at no extra cost.


PAF is licensed annually for each user that has access to it.  Options for system licences and internet licences are also available.


The Harrow Postcode Address List is the most up-to-date and complete address database available for Harrow addresses containing a mixture of business and residential sites.   For your licence fee you will receive the very latest file which will be valid for 12 months use and this includes quarterly updates to ensure it stays up to date.

Data Partnership - Royal Mail Postcode Address File Telephone Preference Service Mailing Preference Service Institute of Direct Marketing