The ranges are indeed overlapping, though the update statements were generated alphabetically rather than in IP order... If the command line will let me query the table directly without being blocked by the ongoing updates, then I could get a rough order of magnitude of progress by doing a null count on the county field... hate to throw queries at it while it's busy updating though...
Try a SELECT ... LIMIT 1; it will find the first row that matches and exit. So you can see if any particular country code has been set. Again, binary search on the codes.
