Hearham.com is your source for 21700+ repeaters and counting!
Free download for offline access:

Or, purchase the premium mobile version:

Repeaters in grid square JO31BP

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.

Mhz

Repeater Callsign	Frequency	Offset	Encode	Decode	Nearest City	Restriction (if any)
OE5XBR	438.35Mhz	-293.5Mhz			Froschberg		Favorite
OE5XBR	144.85Mhz	0Mhz			Froschberg		Favorite