# AddressBase Core Downloads

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### Product download

This page provides downloadable files to support the product in use. To download the product, visit the [OS Data Hub](https://osdatahub.os.uk/data).
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## Classification scheme

The product classification scheme is available to download as a zip file (in CSV and .xlsx formats) from the [classification scheme page](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/classification-scheme) in the AddressBase Fundamentals section.

## Government Statistical Services codes

A Government Statistical Services (GSS) code is a nine character unique identifier for each local authority maintained by the Office for National Statistics (ONS).

GSS codes for AddressBase Core are available to download as a CSV file:

{% file src="<https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2FDshMRds4fNOp1mkv7GHQ%2Fabcore-gss-codes.csv?alt=media&token=690669a7-29b8-4fc9-a406-b4f90cfc4429>" %}

## Local custodian codes

Local custodian codes for the product are available to download as a zip file (in CSV format) from the [AddressBase local custodian codes page ](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase-fundamentals/addressbase-local-custodian-codes)in the AddressBase Fundamentals section.