Thank you! Yes: the pipeline that builds the sheets is public, plain DuckDB SQL from the raw source data to the finished file, and a self-built sheet works end to end. The one difference from the official sheets is the per-country rules section, which is private, so a self-built sheet runs on the engine’s built-in defaults. How to build one: https://gridpin.dev/docs#build

Sorry for the slow reply. US coverage shipped on 24 October. The file is 1.45 GB, and yes, it uses Census TIGER/Line 2025 address ranges alongside the point addresses from the National Address Database and state and county open data (via Overture Maps).

There is no database to build: download one file, then query it locally.

https://gridpin.dev/geocoding-usa