Registration
Creation, renewal, expiry, and status as published by the registry for the domain name
DNS delegation
Name servers and related records that show which hosts resolve the domain
Contacts & registrar
Registrant, technical, abuse, and sponsor details when policy allows disclosure
Public data
Information returned is public registration data, not live DNS resolution or ownership proof
Format
While WHOIS uses plain text and RDAP uses structured JSON, both describe the same registry objects.
Limits
Rate limits, redaction, and TLD policies may hide fields; results are informational only