What are WHOIS and RDAP?

WHOIS and RDAP (Registration Data Access Protocol) are services that provide registration details for domain names or IP addresses. WHOIS is the traditional system, showing information such as the domain owner, contact details, DNS servers, status, and expiration date. RDAP, designed as the modern replacement, delivers the same data in a structured (JSON) format, offering better interoperability and stronger compliance with data protection standards like GDPR.
Depending on the registry, the information may be available through WHOIS, RDAP, or both.