Hello there,
From the description I understand that you are looking for python developer to create a rest API that would be used to determine if IP address are genuine or not.
I can build such a system for you.
If get this job, I would use Django rest framework to build the backend of the API.
Token authentication will also be used to ensure that no unauthorized persons can access the API.
If this sounds like what you, then let's discuss more chat.
Thanks in advance.