Hosting migration with DNS cutover and dependency mapping

Problem

A production site needed to move to a new hosting stack while DNS and related records stayed coherent. TLS, redirects, and mail-related paths had to survive the switch—without a clear map of what owned each layer, cutover risk was high and rollback was unclear.

Approach

Map hosting, DNS, TLS, redirects, and email-related dependencies first. Sequence work with rollback thinking, execute the DNS cutover with checks defined before the window, then run post-change validation beyond the moment of switch—not stopping at “DNS flipped.”

Outcomes

• Cutover executed against a defined validation checklist agreed before the window
• Post-change checks covered the site, TLS continuity, and critical mail paths where in scope
• Issues stayed in one owned thread instead of bouncing between host, registrar, and app vendors

Notes

Representative of cross-system hosting work; not a single named engagement.