Even an IP address isnt difinitive. My geolocation is off. This has affected internet gambling. The phone and home internet can be from a different state. DSL goes to a local DSLAM within the DSL distance limitations and then via ATM to another state. Thats where the IP is assigned.
One guy here when he posts from the corporate office he's thousands of miles away physically from his geolocation. It came up in conversation.
Going behind a proxy, I can be anywhere the proxy service is.
Most, not all, of North America uses 120/240 single phase or split phase for residential. Actually 240 VAC center tapped. You can find 3 phase residential. 110/220 used to be the norm in the US.
100 V puts you somewhere in Japan. Two electron microscopes we had at work were 100V.
3 phase Industrial distribution is nuts with 277 V a possibility for lighting.
As for the OP, you gave yourself away. EU, uk, au. I have no idea. A place where 220 is the norm for residential.