# 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.​

{% hint style="info" %}
The information supplied here is replicated in full on the [Product Refresh Dates](https://docs.os.uk/os-downloads/resources/product-refresh-dates) page, alongside publication information for all of our other Premium and OpenData products.
{% endhint %}

## 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. ​

{% hint style="info" %}
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.
{% endhint %}

| Epoch Number | Publication Date  | Data Cut Date     |
| ------------ | ----------------- | ----------------- |
| 128          | 25 June 2026      | 22 May 2026       |
| 129          | 06 August 2026    | 03 July 2026      |
| 130          | 17 September 2026 | 14 August 2026    |
| 131          | 29 October 2026   | 25 September 2026 |
| 132          | 10 December 2026  | 06 November 2026  |

{% hint style="info" %}

* [AddressBase product 'family' release notes](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes.md) (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](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes.md).
  {% endhint %}

## Past AddressBase epoch publication dates

| Epoch Number | Publication Date  | Data Cut Date     |
| ------------ | ----------------- | ----------------- |
| 127          | 14 May 2026       | 10 April 2026     |
| 126          | 02 April 2026     | 27 February 2026  |
| 125          | 19 February 2026  | 16 January 2026   |
| 124          | 08 January 2026   | 05 December 2025  |
| 123          | 27 November 2025  | 24 October 2025   |
| 122          | 16 October 2025   | 12 September 2025 |
| 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  |


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