Callsigns starting with KFF0
| Callsign | Last heard | Comment |
|---|---|---|
| KFF0289 | 1d0h ago | KD9ADR 14306 SSB KFF-0289, Muscatatuck National Wildlife Refuge |
| KFF0654 | 7m46s ago | KB3WAV 7188 SSB KFF-0654, National Capital Parks |
| KFF0928 | 20h18m ago | KB3WAV 7203 SSB KFF-0928, Fort McHenry |
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