Callook.info
United States ham radio callsigns
- Authentication
- No auth
- HTTPS
- Yes
- CORS
- Unknown
- Category
- Open Data
- Data source
- public-apis + marcelscruz
- Documentation / URL
- https://callook.info
Overview
Callook.info looks up US amateur radio callsigns — keyless.
⚠️ Status (verified 2026-08):
api.callook.infowas unreachable from our network (connection failures). Verify from your network before relying on it.
What it provides
curl "https://api.callook.info/callsign/K1ABC"{ "status": "VALID", "current": { "callsign": "K1ABC", "name": "John Doe", "class": "Extra", "gridsquare": "FN42" } }Notes
- US callsign lookups (FCC data).
- Keyless JSON API.
FAQ
Is Callook free? Yes — free and keyless.
Why can’t I reach it? Our 2026-08 check hit connection failures — verify from your network.
What data is available? US amateur radio callsign info.
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