In the wikimedia.org zone, we have these cases (aside from other generic categories to deal with elsewhere):
www.commons 600 IN DYNA geoip!text-addrs www.meta 600 IN DYNA geoip!text-addrs www.nl 600 IN DYNA geoip!text-addrs noboard.chapters 600 IN DYNA geoip!text-addrs pa.us 600 IN DYNA geoip!text-addrs
The noboard.chapters and pa.us entries seem to already have equivalent noboard-chapters and pa-us entries in DNS and wgCanonicalServers as well. The www entries are non-canonical and can probably just be removed.