As found at Glowforge Map, North America shows this:
Now this is only self reporting owners (not from Glowforge staff or company).
Areas link the NorthEast show:
You can zoom in to get a better visual at the Glowforge Map link. You are not required to login (unless you want to add your location).
TIP: Don’t use your specific address (if you add yourself), but maybe the closest major or secondary intersecting streets.