ISP checker showing odd data

Hey everyone, so we recently launched our little web tool, 'What is My ISP? - Find Your Internet Service Provider', and it's supposed to be a super straightforward utility for, well, ISP identification. But, oh boy, users are reporting some truly bizarre data, and it's giving us a bit of a headache. The main problem is that the tool frequently coughs up generic network information, like a major backbone carrier or a datacenter IP, instead of the actual local internet provider the user is connected to. To make things even more 'fun', sometimes the geolocation is wildly off, showing users in completely different cities or even states! This whole situation is leading to a fair bit of confusion and, understandably, eroding trust in the tool, which is the absolute last thing we want for something that should be so simple. We've tried a few things to get a handle on this digital rebellion. Initially, we integrated with a well-known free GeoIP database. When the weirdness started, we thought, 'Aha! Money will fix it!' So, we upgraded to a paid, supposedly more accurate commercial IP geolocation API. And while it did improve some of the results – we're no longer sending people to Antarctica quite as often – the core problem of misidentifying the end-user's specific internet provider or showing incorrect location persists for a significant chunk of our users. We've meticulously checked our own server logs and all the integration points, and everything *seems* to be processing the data correctly on our end, so we don't think it's an internal screw-up. For example, we've had a user clearly sitting in Brooklyn, NY, seeing their internet provider listed as some massive cloud hosting company down in Virginia. Or another user, happily on their residential fiber connection, being told their ISP is a major mobile carrier. It's almost like the tool is peering into the wrong layer of the network, completely missing the forest for the trees, or, in this case, the local ISP for the backbone infrastructure. Honestly, we're at a bit of a loss here. What are the best practices or most reliable services and databases out there for accurately identifying an end-user's *true* internet provider and getting that precise geolocation data? Are there common pitfalls we might be completely missing when dealing with the nuances of residential versus business IPs, or the complexities of mobile networks? How do the big boys, the ones with all the fancy resources, manage to get this data so incredibly accurately? Any insights, recommendations, or even just a shared story of similar woe would be incredibly helpful! Thanks in advance for any wisdom you can share!