I am working on an application where I have to list on a form select lists all the countries, states and provinces, cities and it's very hard work to add them manually.
My questions are:
Is there any online service that allows me to list all countries, states and provinces, cities and give me the option to integrate them into my form and bring this information dynamically through AJAX?
Is it better to have this information in my database or work with an online service through an API?
Having a site that allows doing this, which are the most recommended and easy to integrate?