Question 1

What is the difference between legacy WHOIS and modern RDAP?

Accepted Answer

Legacy WHOIS returns unstructured text over TCP port 43, while RDAP provides standardized RESTful JSON over HTTPS with better security, internationalization, and privacy.

Question 2

Why is contact data listed as redacted for privacy?

Accepted Answer

Due to GDPR and CCPA regulations, registrars mask personal contact data. WHOIS and RDAP now focus on domain metadata like registrar, nameservers, and lifecycle dates.

Question 3

What does clientTransferProhibited mean in a WHOIS record?

Accepted Answer

It is an EPP status code indicating that the registrar has locked the domain to prevent unauthorized or accidental domain transfers.

Question 4

Does this WHOIS lookup query require a backend server?

Accepted Answer

No. The lookup queries ICANN's open RDAP service and Cloudflare DNS-over-HTTPS directly from your browser without intermediate proxies.

Domain WHOIS & Registration Lookup

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