Search FCC wireless licenses by call sign, entity name, or frequency via the ULS License View API

Steps

1. No API key or authentication is required; the FCC License View API is publicly accessible
2. Search licenses by call sign: GET http://data.fcc.gov/api/license-view/basicSearch/getLicenses?searchValue={callSign}&format=json
3. Search by entity/licensee name: use the same getLicenses endpoint with searchValue set to the entity name and add service=All or a specific service abbreviation (e.g., PW for public safety)
4. Retrieve the full license detail record: GET http://data.fcc.gov/api/license-view/licenses/{callSign}?format=json to get grant date, expiration, status, frequency assignments, and geographic coverage
5. For bulk frequency analysis, download the ULS complete database dump from https://www.fcc.gov/uls/transactions/daily-weekly to get all active records in pipe-delimited flat files
6. Parse the license status field: 'A' (Active), 'E' (Expired), 'T' (Terminated) — filter to Active for current coverage analysis