> For the complete documentation index, see [llms.txt](https://docs.os.uk/os-downloads/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes.md). # Release Notes Release notes listed here provide information about the current release of AddressBase Core and the previous nine releases. {% hint style="info" %} Any interruptions or data issues impacting the AddressBase Core product will be documented on the [AddressBase Core Data Issues, Service Disruption and Planned Maintenance page](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/addressbase-core-data-issues-service-disruptions-and-planned-maintenance.md). {% endhint %} ## [AddressBase Core – 20 October 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/20-october-2026.md) This release note provides information about the 20 October 2026 release of AddressBase Core. ## [AddressBase Core - 13 October 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/13-october-2026.md) This release note provides information about the 13 October 2026 release of AddressBase Core. ## [AddressBase Core – 06 October 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/06-october-2026.md) This release note provides information about the 06 October 2026 release of AddressBase Core. ## [AddressBase Core – 29 September 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/29-september-2026.md) This release note provides information about the 29 September 2026 release of AddressBase Core. ## [AddressBase Core – 22 September 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/22-september-2026.md) This release note provides information about the 22 September 2026 release of AddressBase Core. ## [AddressBase Core – 15 September 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/15-september-2026.md) This release note provides information about the 15 September 2026 release of AddressBase Core. ## [AddressBase Core – 08 September 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/08-september-2026.md) This release note provides information about the 08 September 2026 release of AddressBase Core. ## [Address Base Core – 01 September 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/01-september-2026.md) This release note provides information about the 01 September 2026 release of AddressBase Core. ## [Address Base Core – 25 August 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/01-september-2026.md) This release note provides information about the 25 August 2026 release of AddressBase Core. ## [AddressBase Core – 18 August 2026 release note](/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes/18-august-2026.md) This release note provides information about the 18 August 2026 release of AddressBase Core. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-core/release-notes.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.