How to restrict permissible values entered into Jotform field?

We operate a service business that covers only a limited area.

In order to prevent customer submissions from outside our area (defined by a list of zip codes) we would like to capture/evaluate/HALT customer contact info during data input.

As soon as a non-qualifying zip code is entered, we would like to raise a WARNING and notify Jotform user that we do not service their area.

Is there a way restrict Jotform submissions to ONLY those customers whose zip codes are within our region coverage list of zip codes?

I checked the lastest for you you have in your account and it has a separate Zip (code) field.

If you are referring to that field, you can create a condition that states, "If Zip IS EQUAL TO 12345, HIDE Submit button"

12345 is just a sample Zip Code.

If you would like to prevent submission based on different zip codes entered, you can do what is shown in the screenshot below.

I hope this helps. If you have other questions or concerns, please do not hesitate to let us know.