I work for IPinfo. If you're on a residential connection, the geolocation of that IP address is likely to be accurate up to the ZIP code area. We have generalized hints of location information from over 70 different sources. Then we aggregate them and we map this information based on population density in the geographic region. Sure, our data is becoming more granular, but it's not granular enough to detect individual houses from residential connections.

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