Domain transfer
Transfer usually needs an AuthInfo/EPP code, domain status check, expiry check and an assessment of DNS impact.
Delegation and records
When DNS changes, A, CNAME, MX, SPF, DKIM, DMARC, TXT and optionally DNSSEC records need to be recreated.
Reducing downtime
Lower TTL before migration, complete records and testing from several networks help reduce visible service interruption.
