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Univ. of Arkansas at
Little Rock's Callsign Server with latest FCC data updated daily- Tampa CallBook Server (CBS)
- Buckmaster Publishing's
callsign server
- WM7D's Callsign
Server
- QRZ Callsign Database
- lookup@qrz.com
Univ. of Arkansas at
Little Rock's Callsign Server with latest FCC data updated daily Tampa CallBook Server (CBS) Buckmaster Publishing's
callsign server WM7D's Callsign
Server QRZ Callsign Database lookup@qrz.com U.S. Callsign Server at MIT U.S. Callsign
Server (forms interface to Buffalo/USL server) IK4LZH's QSL Server Finn Callsign Server