1. On Delivery Rates - Zipcode click Upload Zipcodes.
2. In the Upload zipcodes window click Download Template to get a CSV that already contains your current zip codes and the expected columns.
3. Fill the file (see the column question) and save it as .csv.
4. Drag it onto Upload Zipcode or click to browse.
5. Optionally switch on Delete old zipcodes to wipe this kitchen's existing zip codes before importing.
6. Click Import Zipcodes. A banner reports Imported success N lines and M lines with errors!.

The modal also links a third-party Zip Code Tool (freemaptools) to find all zips within a radius.