Yeah, those are the ones and here are the DNS IP's to them too, if needed.
nus.c.shop.nintendowifi.net Primary DNS: 69.25.139.164
Secondary DNS: 69.25.139.164
nus.cdn.c.shop.nintendowifi.net Primary DNS: 217.32.28.230
Secondary DNS: 217.32.28.230
217.32.28.225
nus.cdn.shop.wii.com Primary DNS: 151.249.94.88
Secondary DNS: 151.249.94.88
151.249.94.83
nus.cdn.wup.shop.nintendo.net Primary DNS: 217.32.28.223
Secondary DNS: 217.32.28.223
217.32.28.225
nus.wup.shop.nintendo.net Primary DNS: 69.25.139.188
Secondary DNS: 69.25.139.188