Future and past publication dates

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.​

The information supplied here is replicated in full on the Product Refresh Dates page, alongside publication information for all of our other Premium and OpenData products.

Future AddressBase epoch publication dates

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

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.

Epoch Number	Publication Date	Data Cut Date
122	16 October 2025	12 September 2025
123	27 November 2025	24 October 2025
124	08 January 2026	05 December 2025
125	19 February 2025	16 January 2026
126	02 April 2026	27 February 2026

• AddressBase product 'family' release notes (for all AddressBase products bar AddressBase Core) are available from the AddressBase Core Principles pages of this site.

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

Past AddressBase epoch publication dates

Epoch Number	Publication Date	Data Cut Date
121	04 September 2025	08 August 2025
120	31 July 2025	20 June 2025
119	12 June 2025	09 May 2025
118	01 May 2025	28 March 2025
117	20 March 2025	14 February 2025
116	06 February 2025	03 January 2025
115	19 December 2024	14 November 2024
114	07 November 2024	03 October 2024
113	26 September 2024	23 August 2024
112	15 August 2024	11 July 2024