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AddressBase Products Epoch dates
AddressBase, AddressBase Plus and AddressBase Premium is updated every 6 weeks and aligned to OS MasterMap refresh dates. This 6 week period of time is known as an Epoch.
The product is currently availiable as a full supply each Epoch.
| Epoch number | Epoch refresh dates |
| 12 | 21 January 2013 |
| 13 | 04 March 2013 |
| 14 | 15 April 2013 |
| 15 | 28 May 2013 |
| 16 | 08 July 2013 |
| 17 | 19 August 2013 |
| 18 | 30 September 2013 |