Is it available? + .com .io .ai .co .net alternatives — instant, no login.
100% free · No login · Always confirm with registrar
The checker queries RDAP — the modern structured successor to WHOIS — for your domain. A 404 response from the registry indicates the domain is not registered (available). A found record means it's taken. The tool also checks 5 popular TLD alternatives simultaneously, so you can immediately explore options if your preferred domain is taken.
Bookmark or share checks with /tools/availability.php?domain=myapp.com.
The tool queries RDAP (Registration Data Access Protocol) — a modern, structured alternative to WHOIS. If the registry returns a 404, the domain is likely available. A found record means it's registered.
After checking your domain, the tool also checks the same name across .com, .io, .ai, .co, and .net — so you can instantly see which alternatives are available.
RDAP is highly accurate for modern gTLDs. Some ccTLDs and older registries may not support RDAP. Always confirm availability with your registrar before purchasing.
"Unknown" means the RDAP query timed out or the TLD doesn't support RDAP. Try checking directly with a domain registrar for those cases.