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Why can a DNS change work on one device but not another? This Q&A focuses on interpreting the evidence before changing application or network settings.
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Recursive resolvers and devices can retain answers until their cache entries expire. Compare authoritative responses with the resolver used by each device, and check both IPv4 and IPv6 records. A previous negative response may also be cached. Confirm the record at the authoritative provider before repeatedly editing it; changing TTL after an answer is cached does not retroactively shorten that existing cache entry.
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