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 CM87XJ

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)
W9KKN 440.25Mhz 5Mhz 100.00 100.00 Sunnyvale, CA USA Favorite 446.45Mhz 0Mhz 110.9 Mountain View, CA Favorite
W9KKN/R 440.25Mhz 5Mhz 100.0 Sunnyvale, CA Favorite 445.525Mhz 0Mhz 107.2 Roaming California Favorite
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