rethink uses ipinfo lite (db-ip.com before) - their info atm says germany. it’s a hetzner ip anyway. If you trace the network path you’ll see it’s their fsn1 datacenter.
It looks like there could be a bug in how Rethink “searches” IP ranges to geo location… Rethink doesn’t use the mmdb format, but pre-processes the csv (code) to make it “searchable”.