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AddressBase Products Epoch dates

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

The product is currently available as a full supply or Change Only Update (COU) each Epoch.

Epoch numberPublication date
Data cut date
6611 April 201908 March 2019
6723 May 201919 April 2019
6804 July 201931 May 2019
6915 August 201912 July 2019

Please note that 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.

Past Publication Dates

Epoch numberEpoch refresh dates
6528 February 2019
6417 January 2019
6306 December 2018
6225 October 2018
6113 September 2018
6002 August 2018
5921 June 2018
5811 May 2018
5729 March 2018
5623 February 2018
5511 January 2018

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© Ordnance Survey 2019