Why RDAP matters
RDAP responses are machine-readable and designed for modern registry data access, which makes availability checks easier to interpret.
RDAP guide
RDAP domain checker for app names
RDAP gives domain tools structured registration data, making it a better foundation for availability checks than parsing inconsistent WHOIS text.
Where IANA Bootstrap fits
The IANA Bootstrap registry maps TLDs to the correct RDAP service, so a checker can ask the right registry for each extension.
What Lobby does with RDAP
Lobby checks generated domain labels against selected TLDs and surfaces available options directly in the results list.
When to verify with a registrar
RDAP is useful for shortlisting, but the final buying decision should still be confirmed at the registrar because premium pricing and registry behavior can vary.
Frequently asked questions
Is RDAP the same as WHOIS?
No. RDAP is a newer protocol with structured responses, while WHOIS output is often plain text and inconsistent across registries.
Can RDAP prove every domain is available?
RDAP availability can vary by registry behavior, so Lobby marks failed checks separately instead of pretending every lookup is certain.