Repeater-START, the only open-source offline repeaters mapping app, is available on Github. A working Android phone port is also available.
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Repeaters in grid square FN20WO

This is a listing of repeaters in this grid square.
You can read more about Maidenhead locator/grid squares here from the ARRL website.
If you find one of your local repeaters to be missing, please add it to the list.

Repeater Callsign Frequency Offset Encode Decode Nearest City Restriction (if any)
KC2RQR 442.3Mhz 5Mhz 141.3 141.3 Staten Island piRLP, NY USA Favorite
KD2NFC 446.16Mhz 0Mhz 136.5 Staten Island, NY Favorite
W2RJR 440.65Mhz 5Mhz CC1 Staten Island, New York Favorite
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