Module diff 

Side-by-side comparison of two domains.

DomainDiffer::diff runs a smart lookup (registration) and a status check (DNS resolution + TLS certificate) for each domain concurrently and lines the results up field by field in a DomainDiff. A leg that fails leaves its fields empty (None / no records) and records why in DomainDiff::errors, so a failed check is never shown as a real answer (a status error used to read as “does not resolve”).

Structs

DnsDiff

DNS resolution comparison (A records, nameservers, reachability).

DomainDiff

Side-by-side comparison of two domains across registration, DNS, and SSL.

DomainDiffer

Compares two domains by running lookups and status checks concurrently.

RegistrationDiff

Registration data comparison (registrar, organization, dates).

SslDiff

SSL certificate comparison (issuer, validity, remaining days).