I assume using this?
https://mold.github.io/explrIt's pretty inaccurate though. The majority of my "artists without a country" are just obscurish (sometimes not even that obscure, I mean Cadillac Blindside?) American bands, and it has my top UK band as Embrace, which was Ian MacKaye's post-Minor Threat DC-based emo band. Even my top two from Germany (A country I do listen to a significant number of bands from) are both American.
Chad is the weirdest though, apparently that's Brandston, an emo band from Cleveland?