A guide to checking whether a company is FDA registered, as of November 6, 2026: the drug registration list (DECRS), the device Registration and Listing database, and food facility registration, which is not public. Covers what registration does and does not prove under 21 CFR 207.77 and 807.39, the renewal windows, and an Atlas join of FDA's November 6, 2026 drug registration file with FDA inspection classifications: 221 of 1,850 registered drug establishments inspected since January 2025 had an OAI outcome. Includes two worked examples that go from a registration hit to the facility's inspection record.