Hi,
If post codes ranges limitations don't work for that case, the only option left is to have the shipping plugin geolocation the address with a specific API, like google's:
developers.google.com/maps/documentation...o#GeocodingResponses
Then, when the plugin get the latitude and longitude of the address, it does some math to calculate whether the point is in that 25km radius around the shop's latitude/longitude point.
So it will require the development of a shipping plugin.
Basically, a copy of the manual shipping plugin, which just three options added for the longitude/latitude/radius values of the store, and the implementation of the onShippingDisplay function where the gelocation API would be called, the math done, and the shipping methods from $methods array would be filtered if matching or not and if so, added to the $usable_methods array.
www.hikashop.com/support/documentation/6...ml#onShippingDisplay