I added a reverse DNS zone for my /48 (2001:1938:209::) last night. ZoneCheck is reporting that it is "Unable to find primary nameserver (SOA)": https://www.sixxs.net/tools/zonecheck/?zone=9.0.2.0.8.3.9.1.1.0.0.2.ip6.arpa However, dig +trace clearly shows that the reverse mapping works fine, and I've had other people do reverse lookups on my IPv6 addresses to verify, and they get the proper response. So is ZoneCheck broken or am I missing something very obvious?