Hey Rob,
Not sure if this is helpful or not, but I have a little experience from a project I’m working on in transportation. You can separate each batch of zip codes by the leading digit to create 10 separate zones, Zones 0-9. This gives you a group ...
This is awesome, Simon. This is exactly what I was hoping to do with Airtable, and you just put my random collection of thoughts into an organized strategic plan. Thanks!