Request for a matching City and Zipcode fields autopopulation

Hello

I've looked at different zip, locations, and city apps, but unfortunatly no one wich is wath i'm looking for.

I need two input fields

postal code and the 2nd is city

Now for both i have the list for Belgium city's, and postalcodes

i was woundering how can i make this myself

for instance when somebody give as a postalcode/zipcode 2000 that the seccond field is filled with Antwerp

or that there is a validation that when people give Antwerp as there city, and an other zipcode that there is an error

Thanks

Thank you for contacting us.

It means that we will need to pull a list of zip codes and cities from some place, unfortunately, this is not currently an option. I have attached a feature request ticket to this thread to see if it can be implemented at some point.

We cannot provide any ETA, but we will let you know if we have any updates.

What i actually mean, i've got all the lists, excel with zip and correspondly zipcodes

can i somehow lookup or link the excel on the background to mak it work

It might work if you setup conditional rules for each city/zipcode pair via JotForm, but it does not sound like a normal solution.

Smart Forms Using Conditional Logic

Unfortunately, there is no way to pull data from a remote source without custom programming. We provide form source code, so it can be used in combination with custom programming solutions.