NS_SERIAL_MISMATCH

warning

This domain's nameservers hold different versions of the zone, so which answer a customer gets depends on which server they reach.

Working today, and one change away from not working.

How we know

drift.test
Served by both dns-auth and dns-divergent with different SOA serials, which is a zone transfer that stopped. Every answer is valid and one of them is older, so the domain works for whoever reaches the current server and is stale for everyone else — the fault that produces "it works for me" with nobody lying.