Keep a DNS snapshot on both sides of a migration
Preparation, changes and verification all matter. DNS records are one part you can inspect directly.
What to save before a website migration →
Keep the previous configuration traceable and leave useful evidence for a rollback.
After the switch, check more than one A record →
IPv6, aliases and email can still point to the old environment.
Record type reference
- A / AAAA
- IPv4 and IPv6 addresses associated with a name.
- CNAME
- An alias relationship between one name and another.
- MX
- Incoming mail servers and their preference values.
- TXT
- Public text, such as SPF, verification values or DKIM data.
- NS / SOA
- Nameservers and essential zone information.
- SRV
- Service target, port, priority and weight. Enter the full service name.
- PTR
- Reverse mappings. Enter the corresponding in-addr.arpa or ip6.arpa name.
- CAA
- Public statements about certificate issuance authorization.
Scope of a lookup
All types covers common record types for the name you enter. It does not enumerate every subdomain or perform zone transfers, port scans or global propagation tests. Answers come from one recursive DNS service and may reflect its cache.