Open Data · head-to-head
Callook.info vs Umeå Open Data
Callook.info is a free, keyless lookup service for FCC-licensed US amateur radio callsigns, returning license status, operator class, name, and registered address as either JSON or XML. A live request for a real callsign returns a wildcard Access-Control-Allow-Origin header with no authentication required, confirming it's safe to call directly from browser code.
Umeå's open-data portal runs on the OpenDataSoft platform, publishing the Swedish city's GIS, transit, and municipal datasets through the standard ODS Explore v2.1 API. Every dataset can be queried, filtered, and exported as JSON, CSV, or GeoJSON with no authentication required for public data.
| Callook.info | Umeå Open Data | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON, XML | JSON, CSV, GeoJSON |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
Umeå Open Data supports 3 response formats, while Callook.info offers fewer — pick Umeå Open Data for more integration flexibility.