Dealing with multiple WooCommerce sites sharing the same shipping table rates, adding all those data over and over is a tedious task. You should be doing something more productive. WC Shipping Rates Importer takes care of exporting and importing shipping zone data and table rates (WC premium plugin required) for you!
The plugin has been tested extensively with WP_DEBUG enabled and works seamlessly with multi-site network setup.
For questions, suggestions or issues with this plugin, visit the plugin support page or contact me at wp [dot] joesat [at] gmail [dot ]com.
Screenshots
WC Shipping Rates Importer Main Page. A file has been selected for import.
WC Shipping Rates Importer Post Upload Page. Summary of current WooCommerce zone and table rates data, plus a column of values from the import file.
WC Shipping Rates Importer Post Import Page. A notification that the import has completed successfully.
WC Shipping Rates Importer Export Screen.