Unsupported input
The tool may reject input that does not match the expected content, structure, or file type.
Fix: Confirm the tool input requirements and paste the correct type of data.
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Check domain availability across .com, .net, .org, .io, and .dev with a free RDAP-based search tool for quick naming research.
Check likely domain availability across popular TLDs with a free RDAP-based lookup. This MVP is fast and useful for brainstorming, but it is not a registrar guarantee.
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Last reviewed:
Domain Name Search checks whether a domain is registered by running a DNS SOA lookup followed by a WHOIS query. If both return no authoritative record, the domain is available for registration at any ICANN-accredited registrar.
The tool checks the name across the six most-used TLDs (.com, .net, .org, .io, .co, .app) in parallel, plus any custom TLDs you specify, and suggests phonetically or semantically similar alternatives when the primary name is taken.
Start with the domain Name input you want to process in Domain Name Search.
Get a domain Name result from Domain Name Search that is ready to review, copy, and reuse in the next step of your workflow.
The tool may reject input that does not match the expected content, structure, or file type.
Fix: Confirm the tool input requirements and paste the correct type of data.
Missing fields or partial content can block processing or produce weak results.
Fix: Provide the full required input before running the tool.
Sample or placeholder values can lead to output that looks valid but is not ready for real use.
Fix: Replace placeholders with your actual values before relying on the result.
No — this is a pure lookup tool. Registration has to be done at an ICANN-accredited registrar (Namecheap, Cloudflare, Porkbun, etc.). The tool is informational and has no affiliate links, so the 'available' verdict you see is the same you'd see anywhere.
Pending means the domain is in a grace, redemption, or pending-delete period after expiration — it's not yet available to register. Reserved means the registry (ICANN or the TLD operator) has excluded it from general registration, often because it's trademarked or a reserved keyword. Neither can be registered in the normal way.
DNS and WHOIS are the same data sources registrars use, so 'available' from this tool should match what you see at checkout. Edge cases: some registries (notably .io, .ai, .co) have a 60-minute propagation lag between registration and WHOIS visibility, so a 'just-registered' domain may briefly appear available. Always confirm at the registrar's checkout before relying on it.
No — only DNS availability. A domain can be available to register but still infringe an existing trademark (e.g. 'apple-computers.net'). For trademark clearance, use the USPTO TESS database, the EUIPO search, or a trademark attorney. Domain availability ≠ legal availability.
The tool runs the checks in parallel and is tuned for up to 20 TLDs per request to stay under public WHOIS rate limits. For bulk monitoring of hundreds of names across dozens of TLDs, a paid tool with a WHOIS API (DomainsBot, ResearchKit, WhoisXMLAPI) is a better fit.
The suggestions are generated live against the same DNS/WHOIS pipeline — every suggested name is verified as available at the time of the check. The thesaurus and pronunciation dictionaries we use are open-source (WordNet, CMU Dict), so there's nothing licensed; the suggestions are yours to register if they fit.
Continue the workflow with related tools for domain Name, adjacent input and output steps, or other utilities in the same category. You can also browse the full SEO & Web Tools category for more options.
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