Help with web form

Hello. I had a problem. I need to create a web form, and in one field when entering the address there should be a check. The question is, do we have a list of addresses, how can they be downloaded, so that when the user completes it, would it answer whether there is such an address or not? Thank you

This would need custom coding as the webform is external to SuiteCRM you would need an API call as the user is typing in the address to check your database