Keep it pronounceable
Choose a name customers can repeat, type, and share after hearing it once.
Domain Availability Checker
Check whether a startup domain appears in the public registration system, then confirm the final status with a registrar.
Public RDAP lookup with no account required
Check a domain
Enter a complete domain or a name and choose an extension.
How domain availability checks work
This checker uses RDAP, the modern public protocol for domain registration data. A registration record usually means the domain is already registered. When no record is returned, the domain may be available, reserved, unsupported by the registry, or in a temporary state.
Availability and price can change at any moment. Premium names, registry restrictions, launch phases, and registrar inventory affect the final result. Always complete the purchase through an accredited registrar before investing in a brand.
Important
No RDAP record is an availability signal—not a purchase guaranteeChoose a useful startup domain
A good domain supports recall and trust without creating unnecessary spelling friction.
Avoid ambiguity
Be cautious with hyphens, doubled letters, numbers, and obscure spellings.
Check brand risk
Review trademarks, company names, search results, and major social platforms.
Domain checker FAQ
Does a potentially available result guarantee I can register the domain?
No. Confirm the live status, price, and eligibility with an accredited registrar immediately before purchase.
What is RDAP?
Registration Data Access Protocol is a standardized public system for retrieving structured registration information from domain registries and registrars.
Which domain extension is best for a startup?
.com is widely recognized, but .io, .co, .ai, .app, and market-specific country domains can work when they fit the audience and brand.