WHOIS is the old way of looking up domain registration data. It’s been around since the 1980s and was never designed for today’s internet. WHOIS responses are free-form text, which means every registrar formats them differently. That makes WHOIS data inconsistent, hard to parse, often rate-limited, and sometimes completely blocked.
RDAP (Registration Data Access Protocol) is the modern, standards-based replacement for WHOIS. It delivers the same kinds of information (registrar, registrant, nameservers, creation/expiration dates, abuse contacts), but in a structured JSON format. That makes it cleaner, faster, more reliable, and much easier to integrate into tools like HYAS Insight.
In HYAS Insight, the Current WHOIS panel is now powered entirely by RDAP, so you get:
Faster, more reliable lookups with fewer blocks.
Consistent, structured data instead of messy text.
Future-proof support for richer details like abuse contact roles and vCard extensions.
In short: WHOIS was messy and outdated. RDAP is structured, reliable, and built for the modern internet.