Ip address locator with interactive UI built with js and fetch API

This is my first project using the fetch API, I also tried using basic Javascript es 6 features like classes and objects to make it object oriented(it was my first time doing that too😅), I had to use a different api for the ip address information retrieval, other than the one that was suggested because I found that the 1000 requests limit was too small for me due to the number of tests I had to do, the one I used gave me 10,000 calls monthly which fortunately was enough(the name of the website is IPWHOIS incase your wondering). With all of this stated above I would really appreciate some constructive feed back on any area of my work