Normalize the candidate
The domain is converted to its ASCII form and checked for valid labels.
Direct answer: A domain availability check combines current registration and DNS evidence to label a name registered, possibly unregistered or inconclusive; only a registrar can confirm purchasability.
The server sends the normalized domain through separate DNS and RDAP checks; neither check is a registrar purchase attempt. Result responses are private, uncached and excluded from search indexing. Do not enter passwords or secrets. Read the lookup privacy policy.
What this domain availability check tells you
This check combines registration and DNS evidence to screen a name. It intentionally reports uncertainty: only a registrar's live purchase flow can confirm whether a name can be registered, at what price, and under which eligibility rules.
- Whether registration data currently returns a matching domain object
- Whether DNS publishes records for the name
- Which evidence supports registered, possibly unregistered or inconclusive
A registration expiry date is not a release date; review the domain expiration timeline before interpreting an apparently inactive name.
For a non-ASCII candidate, normalize the name with the ASCII IDN converter before comparing registration and DNS evidence.
How the evidence is collected
Check registration evidence
A positive authoritative RDAP or registry response is stronger than a missing legacy WHOIS response.
Check DNS separately
DNS activity supports operational use, but no DNS answer is common for registered names and is not an availability signal by itself.
Read the fields without overclaiming
| Signal | What it can establish | What it does not prove |
|---|---|---|
| Registration object found | Strong evidence that the exact name is registered. | That the website is active or safe. |
| NXDOMAIN | The queried DNS name does not exist in the resolver's current view. | That the registry will sell it. |
| NoData | The name exists but not for the requested record type. | That the domain is unused. |
| Registrar offer | A current commercial registration response. | Permanent availability or a fixed renewal price. |
DNS returns NXDOMAIN and RDAP returns not found
Label the result possibly unregistered, not guaranteed available. Reserved names, premium inventory, registry policy, launch phases and temporary service errors can still prevent registration. Confirm immediately with an accredited registrar before planning around the name.
Common mistakes
- Equating NXDOMAIN with purchasable
- Publishing a fixed price without a registrar transaction
- Ignoring IDN confusables and the ASCII form
- Assuming an expiring registration is already available
Domain Availability Check FAQ
Can a registered domain have no DNS records?
Yes. It can be parked, intentionally undelegated, misconfigured or between services.
Why can a registrar disagree?
The registrar has live access to registry availability, eligibility and price information that public lookup protocols do not fully express.
Does this reserve the domain?
No. A lookup does not hold or register a name, and availability can change between checks.
Explore more domain availability check and domain research questions