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For Operators Callsign Lookup Claim Your Callsign On the Air RF Exposure Calculator Noise Floor Tracker Propagation Journal For Clubs Club Management Features Field Day Planning Net Logging Member Management Elections & Voting ARES/RACES Readiness Grow Your Club New Officer Guide Replace Spreadsheets More Pricing About Help Log in Get Started Free

Tools built for amateur radio.

Look up any callsign, build your operator profile, broadcast your operating status, and manage your club. Groundwave is the platform where hams connect, organize, and get on the air.

Look Up a Callsign Manage Your Club

Free to get started. No credit card required. See the demo →

800,000+ Licensed operators
10,000+ Clubs in the directory
50 States covered

For you, and for your club.

Whether you are looking up a callsign or running a club, Groundwave has the tools you need.

For Individual Operators

Search over 800,000 FCC-licensed amateur radio operators by callsign, name, or location. Claim your callsign to build a profile with your bio, equipment, and favorite bands.

  • Instant callsign lookup from FCC ULS data
  • Operator profiles with license class, location, and grid square
  • Claim your callsign and customize your profile
  • Browse operators by state, city, or license class
  • Broadcast your operating status and follow other operators
  • RF exposure calculator with PDF export
  • Track your noise floor across all bands with trend charts

For Clubs

Everything your amateur radio club needs in one platform. Member management, net logging, events, elections, dues, and more. Over 10,000 clubs are already in the directory.

  • Member management with roles and callsign verification
  • Net logging with real-time QRZ lookups
  • Events, elections, dues, and document sharing
  • Public club page with custom domain support

Look up any ham in the country.

Type a callsign, name, or city and pull up license details from the FCC ULS database. License class, location, grant and expiration dates, previous callsigns.

  • Search by callsign, name, or city
  • Browse by state or license class
  • Claim your callsign to add a bio, equipment list, and favorite bands
  • Always free, always up to date
Groundwave callsign search and operator profiles

Replace the spreadsheet, the email list, and the Facebook group.

Clubs cobble together a dozen tools to stay organized. Groundwave puts members, events, nets, documents, and messaging in one workspace so nothing gets lost when officers rotate.

  • Calendar with integrated net scheduling and event RSVPs
  • Member directory with callsign verification via QRZ
  • Broadcast messaging and real-time notifications
  • Public club page with your own URL
Groundwave club workspace with calendar, events, and sidebar

See who is on the air right now.

Broadcast your operating status, follow other operators, and see a live activity feed with a map. On the Air turns Groundwave into a real-time view of amateur radio activity.

  • Broadcast your band, mode, frequency, and grid square
  • Follow operators and get notified when they go live
  • Save presets for one-click activation
  • Free for every ham, always
Groundwave On the Air live activity feed with map

Callsign lookup, operator profiles, On the Air, noise floor tracking, and directory browsing are free for every ham, always.

Club plans start free. See club pricing →

Built for hams, by a ham.

Look up a callsign, claim your profile, go on the air, or get your club set up. Groundwave is free to get started and built to grow with you.

Look Up a Callsign Create Your Club

Questions? hello@groundwavehq.com