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Pattern-based discovery can miss unusual hostnames and custom DKIM selectors.

\n

Source facts

\n

Cloudflare states that its quick scan uses recurring record type/name patterns rather than a complete zone-specific inventory. Unusual service names and custom DKIM selectors may not be discovered. The guide explicitly instructs users to review records and add missing entries before changing nameservers. A successful scan therefore does not establish migration completeness.

\n

Source: Cloudflare — Records quick scan.

\n

Applicability

\n

This concerns Cloudflare’s onboarding DNS scan.

\n

DSE recommendation

\n

DSE recommends obtaining an authoritative export or provider inventory and reconciling the scan row by row. Include mail routing, authentication, verification, SRV records, uncommon application subdomains, and delegations. Ask service owners about names not visible in a generic website check. Preserve the original export and log deliberate omissions so a later delivery or login failure can be investigated against an actual migration record. Give each unmatched inventory row an explicit disposition: import, deliberate retirement, or unresolved owner review. Ask the mail owner to check custom selector names and the application owner to check uncommon service records. Leave cutover incomplete while an essential name has no accepted disposition.

\n

Verification

\n

Before cutover, compare the proposed Cloudflare zone with the approved inventory by record type, owner name, and value. Query representative uncommon names directly against the assigned authoritative servers. After activation, test the dependent services and confirm no records were silently omitted merely because the public homepage and www address work.

\n

Official reference

\n

Cloudflare — Records quick scan. Reviewed October 20, 2026.

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Preserve the original export and log deliberate omissions so a later delivery or login failure can be investigated against an actual migration record. Give each unmatched inventory row an explicit disposition: import, deliberate retirement, or unresolved owner review. Ask the mail owner to check custom selector names and the application owner to check uncommon service records. Leave cutover incomplete while an essential name has no accepted disposition.\nVerification\nBefore cutover, compare the proposed Cloudflare zone with the approved inventory by record type, owner name, and value. Query representative uncommon names directly against the assigned authoritative servers. After activation, test the dependent services and confirm no records were silently omitted merely because the public homepage and www address work.\nOfficial reference\nCloudflare — Records quick scan. 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Ask service owners about names not visible in a generic website check. Preserve the original export and log deliberate omissions so a later delivery or login failure can be investigated against an actual migration record. Give each unmatched inventory row an explicit disposition: import, deliberate retirement, or unresolved owner review. Ask the mail owner to check custom selector names and the application owner to check uncommon service records. Leave cutover incomplete while an essential name has no accepted disposition.\n\n## Verification\n\nBefore cutover, compare the proposed Cloudflare zone with the approved inventory by record type, owner name, and value. Query representative uncommon names directly against the assigned authoritative servers. After activation, test the dependent services and confirm no records were silently omitted merely because the public homepage and www address work.\n\n## Official reference\n\n[Cloudflare — Records quick scan](https://developers.cloudflare.com/dns/zone-setups/reference/dns-quick-scan/). 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Ask the mail owner to check custom selector names and the application owner to check uncommon service records. Leave cutover incomplete while an essential name has no accepted disposition.\nVerification\nBefore cutover, compare the proposed Cloudflare zone with the approved inventory by record type, owner name, and value. Query representative uncommon names directly against the assigned authoritative servers. After activation, test the dependent services and confirm no records were silently omitted merely because the public homepage and www address work.\nOfficial reference\nCloudflare — Records quick scan. 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