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.
| Epoch number | Publication date | Data cut date |
| 77 | 16 July 2020 | 15 June 2020 |
| 78 | 27 August 2020 | 27 July 2020 |
| 79 | 8 October 2020 | 8 September 2020 |
| 80 | 19 November 2020 | 19 October 2020 |
| 81 | 7 January 2021 | 30 November 2020 |
Past epoch publication dates
| Epoch number | Publication date | Data cut date |
| 76 | 4 June 2020 | 4 May 2020 |
| 75 | 22 April 2020 | 23 March 2020 |
| 74 | 12 March 2020 | 10 February 2020 |
| 73 | 30 January 2020 | 6 January 2020 |
| 72 | 18 December 2019 | 18 November 2019 |