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.
*There is potential for the publication date of Epoch 81 to move to the week commencing 11 January 2021 following Christmas closure.
| Epoch number | Publication date | Data cut date |
| 81 | 7 January 2021* | 30 November 2020 |
| 82 | 18 February 2021 | 18 January 2021 |
| 83 | 1 April 2021 | 1 March 2021 |
| 84 | 13 May 2021 | 12 April 2021 |
| 85 | 24 June 2021 | 24 May 2021 |
Past epoch publication dates
| Epoch number | Publication date | Data cut date |
| 80 | 19 November 2020 | 19 October 2020 |
| 79 | 8 October 2020 | 8 September 2020 |
| 78 | 27 August 2020 | 27 July 2020 |
| 77 | 16 July 2020 | 15 June 2020 |
| 76 | 4 June 2020 | 4 May 2020 |