OpenCallbook is provided free of charge, as-is, under the Apache 2.0 license.
API use
- Anonymous traffic is rate-limited to 60 requests per minute per IP.
- Bulk crawling of the dataset is not supported via the public API.
- Don't use the data to spam licensees or for any purpose that violates the FCC's terms for the ULS public release.
No warranty
The service and data are provided as-is. License records reflect the FCC's most recent weekly dump and may lag the FCC's live system by up to a week. Don't rely on this data for legal or compliance purposes — verify with the FCC's official ULS system at wireless2.fcc.gov.
Attribution
If you build on OpenCallbook, a link back is appreciated but not required. Credit the FCC ULS where applicable.