CallSign Check — Support

CallSign Check is an iOS app for looking up amateur radio callsigns — US (FCC) and DX — with band conditions, vanity availability, and advanced search.

Contact

For questions, bug reports, or feature requests, email andrewmurphy479@gmail.com. Include your iOS version and a description of what happened, and I’ll get back to you as soon as I can.

Common questions

• A callsign isn’t found. US lookups use VFO A and search the FCC database; worldwide (DX) callsigns need VFO B. If a valid US call comes back empty, the FCC record may be newly granted — databases update daily.
• License data looks outdated or wrong. The app displays public FCC Universal Licensing System records as published. Corrections must be made with the FCC; the app will reflect them once the source updates.
• Distance and beam heading are missing. These need location access. Enable it in Settings → Privacy & Security → Location Services → CallSign Check. Your position is used on-device only and never transmitted.
• Band conditions aren’t showing. The HF conditions strip hides itself when solar data can’t be fetched — check your connection and pull to refresh.
• Clearing history and favorites. Lookup history and favorites are stored only on your device and can be erased in the app’s Settings.

Privacy

No accounts, no analytics of our own, and your location never leaves your device. Full details in the privacy policy.