Jul 7, 14:00 UTC
Resolved - Secondary DNS zone transfers (AXFR/IXFR) using legacy IP addresses may have experienced intermittent failures between 14:50 and 16:10 UTC. The underlying issue has been corrected and all zone transfers are now operating normally.
This is a companion discussion topic for the original entry at https://www.cloudflarestatus.com/incidents/dthgj6gr726s