Location based search bar

Is it possible to build something similar to below? 

I'm guessing it would fall back on a database of locations/post codes that either fall within our outside of the delivery zone. 

The business offers a delivery service, but this will not need a booking interface. It's purely to confirm delivery zones with a yes/no.

Is anyone familiar with a plugin/code snippet that would achieve this?

That's awesome, thank you Emily! 

Do you add it in just by using a code block?

Hi All, 

I have a free solution to this. Using Cognito Forms (free plan available) you can embed a form into your squarespace site. When they place a postcode in, the form drops down custom text. 

There is a little background work required with what you want the text to say when the post code is submitted but it is relatively simple and customised. 

See example here, try post code 6000. Then try postcode 4000 for example. https://www.yellowlinecoffee.com.au/shipping

Let me know if you need any more info if setting up.