Download and parse the FCC Universal Licensing System amateur radio license database
domain: fcc.gov · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Fetch the complete amateur radio license file (l_amat.zip) from the FCC ULS public access download page; the complete files are regenerated early Sunday mornings.
For incremental updates, fetch the daily transaction file for the amateur service (e.g. l_am_[day].zip), generated Tuesday through Saturday mornings.
Unzip the archive and locate the pipe-delimited .dat files (e.g. HD.dat for header/license data, EN.dat for entity/name-address data, AM.dat for amateur-specific class/group fields).
Parse each .dat file according to the field layout documented in the FCC's ULS public access file specification (the pubacc_intro documentation PDF).
Join records across .dat files on the shared Unique System Identifier / call sign to assemble a complete license profile per station.
Known gotchas
There is no current, reliably documented real-time JSON query API for individual license lookups from the FCC; the well-documented public interface is these weekly/daily bulk-download files, not the wireless2.fcc.gov HTML search forms (which are not a machine API).
Data files are pipe-separated with no header row, so exact column order must be taken from the ULS public access documentation rather than guessed.
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