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Walksort Database

Database Versions, Releases and Monthly Updates:

The current Version of the Walksort Database is Database 2007. Each Version of the Walksort Database will have a number of Releases. Release 7a of Walksort Database 2007 became available for download on 5 May 2008, and may be used for Walksort mailings from 5 May 2008 to 5 September 2008.


A new release of the Walksort Database is issued online every month. This allows the Database to be as up-to-date as possible, including details from the monthly updates to Royal Mail's Postcode Address File as well as any changes in local postal rounds (or "walks").

Customers who download their Walksort Database from this site will be able to obtain a freshly-updated release from the first Monday of each month.

Database 2007CDROMRelease DateValid FromValid UNTILRelease ID
Release 1aYes8 May 200723 Jul 20078 Sep 20071
Release 1b4 Jun 200723 Jul 20074 Oct 20071
Release 2a2 Jul 200723 Jul 20072 Nov 20072
Release 2bYes6 Aug 20076 Aug 20076 Dec 20072
Release 3a3 Sep 20073 Sep 20073 Jan 20083
Release 3b1 Oct 20071 Oct 20071 Feb 20083
Release 4aYes5 Nov 20075 Nov 20075 Mar 20084
Release 4b3 Dec 20073 Dec 20073 Apr 20084
Release 5a7 Jan 20087 Jan 20087 May 20085
Release 5bYes4 Feb 20084 Feb 20084 Jun 20085
Release 6a3 Mar 20083 Mar 20083 July 20086
Release 6b7 Apr 20087 Apr 20087 Aug 20086
Release 7aYes5 May 20085 May 20085 Sep 20087
Release 7b2 Jun 20082 Jun 20082 Oct 20087
Release 8a7 Jul 20087 Jul 20087 Nov 20088
Release 8bYes4 Aug 20084 Aug 20084 Dec 20088
Release 9a1 Sep 20081 Sep 20081 Jan 20099
Release 9b6 Oct 20086 Oct 20086 Feb 20099
Release 10aYes3 Nov 20083 Nov 20083 Mar 20090
Release 10b1 Dec 20081 Dec 20081 Apr 20090
Release 11a5 Jan 20095 Jan 20095 May 20091
Release 11bYes2 Feb 20092 Feb 20092 Jun 20091
Release 12a2 Mar 20092 Mar 20092 Jul 20092

As it is important always to use a recent Release of the Walksort Database, Royal Mail recommends that, wherever possible, Walksort users should download the latest Database from this website before preparing a particular mailing. Customers who post infrequently, maybe only once or twice a year, need not download the data onto their systems every month, but it is recommended that this is done prior to starting work on each Walksort posting.

While monthly updating of the data is recommended to maximise the effectiveness of your mailings and the discounts you receive, Royal Mail is not making this compulsory. However, customers must always use a Walksort Database which is no more than 4 months old. Failure to use a Walksort Release no more than 4 months old will result in the delay of your mailing and/or a loss of discount.

Terms and Conditions:

In order to obtain a copy of the Walksort Database, you will need to Agree the Walksort Database Terms and Conditions. This is primarily to ensure that you agree that the database will only be used for the purpose described within the agreement - i.e. the sortation of mailings.

Licence Number and Key

Once you have agreed the Terms and Conditions, please contact the Mailsort Technical Department and you will be issued with a Walksort Licence Number and Key. You will need this Licence Number and Key to enable you to download the Walksort Database. To obtain it, contact the helpline by email at helpline@mailsorttechnical.com with your name, job title, company name, address and business telephone number.

Database File Formats:

The Walksort Database is available in Fixed Field Width and Comma Delimited Field text formats for use by Walksort software.

The database files for the whole of the UK are reasonably large (30-40 Mb, zipped to 4-5 Mb). You may download either the entire UK database or a selected portion of the database covering the areas to which you will be mailing. Should you choose the latter option, you will need to know the Postcode Areas that you require.

The Walksort Database has been Zipped. For more information on Zip files, Click Here.

Downloading a Database:

In order to be able to inform you of changes and updates to the Walksort Database and to ensure that only licenced users obtain the Database, we require a few details before proceeding. When you click to "Download Walksort Database...", below, you will be taken through the registration process.

At the end of the registration process you will need to enter your Walksort Licence Number and Key (see above).

If you have registered with Mailsort Technical before, then you will not be required to register again. However, please do let us know by email if your details have changed.

Download Walksort Database 2007 Release 7a for use from 5 May 2008