The Ordnance Survey release a new version of the AddressBase epoch every six weeks. We package this for you and release it to the secret server.
We can only provide AddressBase to Local Authorities or organisations that are Public Sector Geospatial Agreement (PSGA) members. You can check if your organisation is a member in the Ordnance Survey website.
Here's the most recent releases.
Release date | Version |
November 2025 | Epoch 123 |
October 2025 | Epoch 122 |
September 2025 | Epoch 121 |
August 2025 | Epoch 120 |
June 2025 | Epoch 119 |
May 2025 | Epoch 118 |
March 2025 | Epoch 117 |
February 2025 | Epoch 116 |
Update your AddressBase database
Hosted customers
If you're hosted with us, simply raise a new case online and reference the title of this article.
Self-hosted customers
If you're self-hosted, you can check the epoch you're running using this SQL script.
⚠️ Important: If you're currently on a version prior to 122, and are upgrading to 122 or above, you'll also need to import the new ward codes the first time you update.
Oracle
select * from addresses.epoch
SQL Server
use addresses;
select * from epoch;