IP geolocation accuracy help?

Hey everyone,

I'm super new to this, just launched my first web tool, an IP Lookup Tool to help users get IP address details. It's been really exciting to finally get something out there!

However, I've noticed some inconsistencies with the IP geolocation data my tool provides, especially for certain ISPs or mobile users. I'm trying my best to provide the most accurate and reliable data possible for my users, but this is proving to be a bit trickier than I expected.

• What are the common challenges with IP geolocation accuracy?
• Are there specific free/paid APIs or data sources that are known for better accuracy for an IP Lookup Tool?
• Any best practices for handling tricky cases like mobile IPs, VPNs, or proxies to improve the data?
• What's a realistic expectation for IP geolocation accuracy in general?

Anyone faced this before?