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 DM13PR

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)
WB6AIA 445Mhz 0Mhz 114.8 114.8 Idyllwild - EchoLink#39419, CA USA Favorite
K6TMD 446.0625Mhz 0.6Mhz CC1 Pine Cove, California Favorite
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