# Release Notes

{% hint style="info" %}

* The 'AddressBase Products' release notes include information on the AddressBase, AddressBase Plus and AddressBase Premium products.
* The 'AddressBase Islands' release notes include information on the AddressBase Plus Islands and AddressBase Premium Islands products.
* AddressBase Core is supplied weekly and its release notes can be found on the [AddressBase Core Release Notes page](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes.md).
* OS Open UPRN release notes can be found on the [OS Open UPRN Release Notes pages](/os-downloads/products/addresses-and-names-portfolio/os-open-uprn/release-notes.md).
  {% endhint %}

## Epoch 127

### [AddressBase products – May 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-may-2026-epoch-127.md)

This release note provides information about the May 2026 (Epoch 127) release of AddressBase products.

### [AddressBase Islands products – May 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-products-may-2026-epoch-127.md)

This release note provides information about the May 2026 (Epoch 127) release of AddressBase Islands products.

## Epoch 126

### [AddressBase products – April 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-april-2026-epoch-126.md)

This release note provides information about the April 2026 (Epoch 126) release of AddressBase products.

### [AddressBase Islands products – April 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-products-april-2026-epoch-126.md)

This release note provides information about the April 2026 (Epoch 126) release of AddressBase Islands products.

## Epoch 125

### [AddressBase products – February 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-february-2026-epoch-126.md)

This release note provides information about the February 2026 (Epoch 125) release of AddressBase products.

### [AddressBase Islands products – February 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-products-february-2026-epoch-125.md)

This release note provides information about the February 2026 (Epoch 125) release of AddressBase Islands products.

## Epoch 124

### [AddressBase products – January 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-january-2026-epoch-124.md)

This release note provides information about the January 2026 (Epoch 124) release of AddressBase products.

### [AddressBase Islands products – January 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-january-2026-epoch-124.md)

This release note provides information about the January 2026 (Epoch 124) release of AddressBase Islands products.

## Epoch 123

### [AddressBase products – November 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-november-2025-epoch-123.md)

This release note provides information about the November 2025 (Epoch 123) release of AddressBase products.

### [AddressBase Islands products – November 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-november-2025-epoch-123.md)

This release note provides information about the November 2025 (Epoch 123) release of AddressBase Islands products.

## Epoch 122

### [AddressBase products – October 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-october-2025-epoch-122.md)

This release note provides information about the October 2025 (Epoch 122) release of AddressBase products.

### [AddressBase Islands products – October 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-october-2025-epoch-122.md)

This release note provides information about the October 2025 (Epoch 122) release of AddressBase Islands products.

## Epoch 121

### [AddressBase products – September 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-september-2025-epoch-121.md)

This release note provides information about the September 2025 (Epoch 121) release of AddressBase products.

### [AddressBase Islands products – September 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-september-2025-epoch-121.md)

This release note provides information about the September 2025 (Epoch 121) release of AddressBase Islands products.

## Epoch 120

### [AddressBase products – July 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-july-2025-epoch-120.md)

This release note provides information about the July 2025 (Epoch 120) release of AddressBase products.

### [AddressBase Islands products – July 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-july-2025-epoch-120.md)

This release note provides information about the July 2025 (Epoch 120) release of AddressBase Islands products.

## Epoch 119

### [AddressBase products – June 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-june-2025-epoch-119.md)

This release note provides information about the June 2025 (Epoch 119) release of AddressBase products.

### [AddressBase Islands products – June 2025 release note](#addressbase-islands-products-june-2025-release-note)

This release note provides information about the June 2025 (Epoch 119) release of AddressBase Islands products.

## Epoch 118

### [AddressBase products – May 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-products-may-2025-epoch-118.md)

This release note provides information about the May 2025 (Epoch 118) release of AddressBase products.

### [AddressBase Islands products – May 2025 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/release-notes/addressbase-islands-may-2025-epoch-118.md)

This release note provides information about the May 2025 (Epoch 118) release of AddressBase Islands products.


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