AddressBase release information

Find upcoming and past epoch dates and release notes for our addressing products

AddressBase, AddressBase Plus, AddressBase Premium and AddressBase Islands are updated every six weeks. This six week period of time is known as an epoch.​

Our AddressBase products are currently available as a full supply or Change Only Update (COU) for each epoch.​

Future dates are provided as an indication only and are subject to change. Data cut dates are estimated; these are given to provide an indication of the last point at which changes will reach the epoch. ​

Please note: as we approach the publication date and prepare to release a new epoch, any new requests placed for data will be paused to ensure data integrity. These requests will be processed as soon as this pause is lifted.

Download AddressBase Core release notes

AddressBase Core is a weekly supply and information is covered in a separate release note.

Publication date

Release note

27 February 2024AddressBase Core Release Note (PDF)
20 February 2024AddressBase Core Release Note (PDF)
13 February 2024AddressBase Core Release Note (PDF)
06 February 2024AddressBase Core Release Note (PDF)
30 January 2024AddressBase Core Release Note (PDF)
23 January 2024AddressBase Core Release Note (PDF)
16 January 2024AddressBase Core Release Note (PDF)
09 January 2024AddressBase Core Release Note (PDF)
03 January 2024AddressBase Core Release Note (PDF)
19 December 2023AddressBase Core Release Note (PDF)

Past AddressBase epoch dates and release notes

The AddressBase release note includes information on our AddressBase, AddressBase Plus, AddressBase Premium and OS Open UPRN products.

There is a separate release note for our two AddressBase Islands products.

Epoch number

Publication date

Data cut date

Release notes

10822 February 202418 January 2024

AddressBase & OS Open UPRN Release Note (PDF)

AddressBase Islands Release Note (PDF)

10705 January 202430 November 2023

AddressBase & OS Open UPRN Release Note (PDF)

AddressBase Islands Release Note (PDF)

10623 November 202319 October 2023

AddressBase & OS Open UPRN release note (PDF)

AddressBase Islands release note (PDF)

10512 October 20237 September 2023

AddressBase & OS Open UPRN release note (PDF)

AddressBase Islands release note (PDF)

10401 September 20234 August 2023

AddressBase & OS Open UPRN release note (PDF)

AddressBase Islands release note (PDF)

10327 July 202326 June 2023

AddressBase & OS Open UPRN release note (PDF)

AddressBase Islands release note (PDF)

10215 June 202322 May 2023

AddressBase & OS Open UPRN release note (PDF)

AddressBase Islands release note (PDF)

10112 May 202311 April 2023

AddressBase & OS Open UPRN release note (PDF)

AddressBase Islands release note (PDF)

10030 March 202327 February 2023

AddressBase & OS Open UPRN release note (PDF)

AddressBase Islands release note (PDF)

9916 February 202316 January 2023

AddressBase & OS Open UPRN release note (PDF)

AddressBase Islands release note (PDF)

Upcoming epoch publication dates

Epoch number

Publication date

Data cut date

10623 November 202320 October 2023
10705 January 202430 November 2023
10822 February 202418 January 2024
10905 April 202429 February 2024
11016 May 202411 April 2024

Related products

  • AddressBase

    AddressBase matches 29 million Royal Mail postal address to unique property reference numbers, bringing a geographical dimension to the matched records.

  • AddressBase Core

    AddressBase Core is a simple, accessible addressing data product giving plug and play access to complete, accurate address data.

  • AddressBase Islands

    An addressing gazetteer offering full lifecycle information of a property for Northern Ireland, Isle of Man and the Channel Islands.

  • AddressBase Plus

    A dataset containing UPRN, PAF UDPRN, business/residential classification, local authority current addresses and the OS MasterMap TOID.

  • AddressBase Premium

    An addressing gazetteer offering full lifecycle information of a property that can be used within geographical information systems & database systems.

OS products refresh dates

Find out the update frequencies of our digital mapping products.