After a registrar transfer last week, some users resolve the site and others get NXDOMAIN or SERVFAIL. Where did delegation break?

Mixed resolution after a transfer is not propagation voodoo. Compare the parent delegation, authoritative answers and validation results. NXDOMAIN and SERVFAIL are clues; neither names a unique cause.

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Next in this trackA price change shipped an hour ago and half the world still sees the old number, though the purge reported success. Find the gap.Next in this trackLast night's failover left both database nodes accepting writes for four minutes. Finance wants to know which orders are real.Next in this trackA pod restarts every ten days, nobody reproduces the leak locally, and instant-use alerts stay green. How do you catch it?

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