Traditional WHOIS responses are blocks of registry-specific text. Labels, date formats, rate limits, referral behavior, and redaction notices differ, so a parser either becomes a collection of exceptions or silently maps the wrong field. RDAP returns typed JSON and uses a bootstrap system to reach the right registration service for the top-level domain.
The normalized view retains operationally useful fields: registrar, object handle, lifecycle events, EPP statuses, nameservers, and DNSSEC delegation state. It deliberately excludes vCard contact records for registrants. This keeps the lookup focused on domain diagnostics and avoids republishing personal data that may be present in an upstream response.
Read missing data literally
“Not published” does not mean the event never happened. A registry can omit an expiration date, use an event action that does not map to the normalized summary, or redact details under its access policy. The event table remains available so you can inspect every recognized timestamp returned.
Use the domain age checker when you only need elapsed time from the registration event. For live DNS rather than registry delegation metadata, open the DNS lookup or compare recursive caches with the DNS propagation checker.