• BUCKMASTER Callsign server
• Callsign server at QRZ
• Callsign server at UALR using FCC database
• QSL Info - over 43,000 QSL Managers/Direct addresses
• QSL Route Info by IK4LZH
• ARAS Canadian Callbook
• DK0TUI: QSL information for HAM's
• Guernsey Callbook
• QSL Info Database by DB0SDX
• Downloadable QSL info Database

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