Currently I’m working on a big server migration. Where a lot of small sites get moved over. And a lot of the domain names are registered and managed at third parties.
So after each move I have to check a lot of DNS records to see if the move is final.
Usually I use the mxtoolbox which is great to check DNS records.
But I needed a more bulk option for this mass migration.
Enter the dig command
Check A record:
dig example.com A +short
Check AAAA record (ipv6)
dig example.com AAAA +short
dig example.com CNAME +short
Check A, AAAA and CNAME all at once.
dig example.com AAAA example.com CNAME example.com A +short
These commands return very compact ip’s or domainnames.
Which are easy to scan.
I’m not sure if these are cached.