How can users check their IP address against the MaxMind database?

Using the demo form on the MaxMind website is the correct choice because it is specifically designed for users to check their IP addresses against the MaxMind database. The demo form allows users to enter an IP address and see the geolocation and other data associated with that address according to the MaxMind database. This method provides a straightforward, user-friendly way to verify information without needing to go through customer support or use other indirect methods.

Other alternatives, such as contacting customer support or submitting a feedback report, would not provide immediate access to the database for this purpose. While checking through Dynatrace's user interface may offer some integration features, it wouldn't directly facilitate a check against the MaxMind database itself.