Trace to mine
Pick a magnet maker and follow its route back to the mine, step by step, with a result for 2027 contracts: documentable now, needs lot records, or not documentable today.
/ Lodeline Map
The supply chain,
traced to the mine.
The Lodeline Map is our research tool for defense suppliers and their sourcing teams. It shows who mines, separates, refines, makes and recycles NdFeB and SmCo magnets outside China, each site's China exposure, and whether each mine-to-magnet route can be documented for contracts awarded on or after 1 January 2027.
- 75+companies
- 20+countries
- 30+traced routes
- 2×weekly updates
Find suppliers
Search and filter every company by stage, country, status and China exposure, then export the list to CSV.
Sources you can check
Every entry quotes a primary source, such as a filing, a company page or a government record, with its date. Updated twice a week, in English and Traditional Chinese.
Screen a parts listPaste part descriptions and see which may contain covered magnets, tungsten or tantalum. Runs in your browser; nothing is uploaded.
See a sample evidence packWhat you receive for each part: the stages, what each document says, what is still missing, and the questions to send each supplier.
Each request is reviewed by the founders. The map is research from public sources, not legal advice or government certification.