Looks up the same record set for many domains at once over DNS-over-HTTPS (Cloudflare, Google or Quad9) and compares the answers: a matrix of domains × record types, then for each type the distinct answer sets and which domains share them — handy for spotting domains on the same nameservers or mail provider, stale A records after a migration, or missing CAA. NXDOMAIN and resolver errors are shown per domain, and a CSV of the matrix is the secondary output. Names are sent to the chosen resolver; nothing is stored.