Release Notes

Release notes listed here provide information about the current release of the AddressBase 'family' of products and the previous nine releases.

• 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 Open UPRN release notes can be found on the OS Open UPRN Release Notes pages.

Epoch 129

AddressBase products – August 2026 release note

This release note provides information about the August 2026 (Epoch 129) release of AddressBase products.

AddressBase Islands products – August 2026 release note

This release note provides information about the August 2026 (Epoch 129) release of AddressBase Islands products.

Epoch 128

AddressBase products – June 2026 release note

This release note provides information about the June 2026 (Epoch 128) release of AddressBase products.

AddressBase Islands products – June 2026 release note

This release note provides information about the June 2026 (Epoch 128) release of AddressBase Islands products.

Epoch 127

AddressBase products – May 2026 release note

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

AddressBase Islands products – May 2026 release note

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

Epoch 126

AddressBase products – April 2026 release note

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

AddressBase Islands products – April 2026 release note

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

Epoch 125

AddressBase products – February 2026 release note

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

AddressBase Islands products – February 2026 release note

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

Epoch 124

AddressBase products – January 2026 release note

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

AddressBase Islands products – January 2026 release note

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

Epoch 123

AddressBase products – November 2025 release note

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

AddressBase Islands products – November 2025 release note

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

Epoch 122

AddressBase products – October 2025 release note

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

AddressBase Islands products – October 2025 release note

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

Epoch 121

AddressBase products – September 2025 release note

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

AddressBase Islands products – September 2025 release note

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

Epoch 120

AddressBase products – July 2025 release note

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

AddressBase Islands products – July 2025 release note

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