The problem with IP geolocation is that at the city and ZIP code level, it's just imprecise enough to be kind of annoying for something like this. It's very pos

The problem with IP geolocation is that at the city and ZIP code level, it's just imprecise enough to be kind of annoying for something like this. It's very possible 2 people in the same ZIP code may be geolocated to neighboring but different ZIP codes. At US state (and often international province/region) level you generally get nearly 100% accuracy, but that's probably too broad for something like this. Unfortunately I'm not sure there's really anything in between that you could use.