Who owns this IP address?
The location is an estimate based on the provider, not a street address.
What do I see when I look up an IP address?
You see which provider or company the address belongs to, the number of that network (the AS number), an estimated location and the hostname if the owner has set one. For a domain you first see which addresses the domain points to.
Can I see who is behind an IP address?
No. You see the provider or the hosting company, not the person or customer. Only the provider itself knows that link.
Why do some addresses have no location?
Addresses such as 192.168.1.1 or 10.0.0.5 only exist inside a local network, like at home behind your router. They are in use in thousands of places at once, so they have no place on the map.