It is not really fingerprinting but I realized that ipinfo can place my IP on my house. I guess some stupid phone sent the GPS location. Isn't that supposedly under GDPR in Europe? Can I delete it somehow?
However, our data is improving for POI (Points of Interest). For example, with data centers, we're working on identifying the exact data center from IP addresses. Similar accuracy applies to airports, hotels, and conference halls, as they tend to have a large concentration of IP addresses in a very small area.
We do publish a lot of information on our research page: https://ipinfo.io/data-research
For example, we know where our ProbeNet PoPs are located. If hops to your ranges are through private IPs or sub 1 MS RTT, we can pretty much confidently tell the name of the data center. However, considering that there are data centers that span thousands of square meters, we can point to the data center building, rather than the rack or the room.
To me, it is likely a coincidence.