Domain Availability Checker
Check domain availability across 100+ TLDs instantly.
Why accurate domain availability checking is hard
Domain availability checking is not a single WHOIS query. A reliable domain availability checker must account for protocol gaps, registry policies, and DNS reality.
RDAP support varies
Some TLDs fully support RDAP, while others only expose partial or inconsistent registry data.
Legacy WHOIS dependencies
Many registries still rely on legacy WHOIS with rate limits, partial responses, or outdated records.
Intentional throttling and redaction
Registry policies can block, throttle, or redact availability signals, leading to false positives or negatives.
DNS delegation mismatch
A domain can look available in WHOIS/RDAP while still being delegated in DNS, causing misleading results.
Multi-layer availability detection
We validate every candidate through WHOIS, RDAP, and DNS. Only when all signals agree do we mark a domain as available.
WHOIS query layer
Compatible with legacy TLDs, handles rate limits, partial responses, and registrar-level reservation patterns.
RDAP protocol layer
Standards-based, structured registry data where RDAP is supported, offering more reliable responses for modern gTLDs.
DNS resolution layer
Confirms real-world delegation status and resolves edge cases where WHOIS or RDAP is inconclusive.
Check domain availability at scale
Run domain availability checks from one keyword to thousands of candidates with speed and consistency.
Bulk availability checks
Evaluate large batches of candidate names without manual lookup overhead.
Keyword-based discovery
Generate and validate domains from a single keyword or seed phrase.
Hundreds of TLDs per run
Traverse a wide set of gTLDs, ccTLDs, and new TLDs in one request.
Near real-time results
Receive fast, protocol-aware responses designed for automation and scale.
Supported TLD coverage
Coverage spans global, regional, and emerging extensions so you can check domain availability where your audience lives.
Popular gTLDs
Including .com, .net, .org, .io, .ai, and other global extensions.
Country-code TLDs
Support for ccTLDs with registry-specific behavior and local constraints.
New gTLDs
Modern extensions for vertical positioning, creativity, and niche markets.
Registry-restricted TLDs
Handles partially opaque or policy-driven registries with specialized logic.
Registrar-independent results
This domain availability checker does not depend on a single registrar API, so results reflect registry-level reality.
No registrar bias
Availability is determined by registry signals, not registrar inventory or marketing logic.
No artificial premium inflation
We do not rewrite availability to drive upsells or premium pricing.
Registry-level truth
Your results align with how the internet actually resolves and delegates domains.
Who uses this domain availability checker
Designed for teams who need accurate availability decisions before naming, branding, or acquisition.
Founders & startups
Validate brandable domain ideas before committing to a product name.
Domain investors
Scan multiple extensions efficiently and avoid false availability signals.
Agencies & creators
Deliver accurate domain availability checks to clients without manual verification.
Developers
Use a reliable availability layer before integrating registrar purchase flows.
Built on internet naming standards
Our availability checks are grounded in WHOIS standards, RDAP specifications, and real DNS behavior.
ICANN WHOIS standards
Structured to respect registry rules while extracting actionable availability signals.
RDAP specifications
Uses the modern, structured protocol where registries expose RDAP endpoints.
DNS resolution behavior
Verifies delegation so you avoid ghost availability and cached registry data.
Designed for edge cases
We account for non-standard registry behavior that breaks simple availability checks.
TLDs with disabled RDAP
Fallback logic uses WHOIS and DNS to keep results accurate.
Incomplete WHOIS responses
We interpret partial data safely instead of marking domains available by default.
Reserved or blocked domains
Registry-level reservation patterns are handled to avoid false availability.
Registry-specific quirks
Includes ccTLD behavior such as .io and other unique registry policies.
Fast, clean, and developer-friendly
Built for performance and clarity when domain availability checking becomes a workflow.
Optimized concurrent checks
Parallelized validation keeps throughput high without sacrificing accuracy.
Smart retry and fallback
Automatic retries and protocol fallback reduce false negatives.
Readable availability output
Clear signals and normalization keep results easy to consume.
No upsell noise
Stay focused on availability, not checkout optimization.
Domain availability checker fundamentals
Understand the protocol foundation behind accurate availability decisions.
What is a domain availability checker?
A domain availability checker determines whether a domain name is registered or available, using WHOIS, RDAP, and DNS data together to avoid inaccurate results.
Why WHOIS alone is not enough
WHOIS can be rate-limited, cached, redacted, or inconsistent across registries, so modern checks require multi-protocol validation.
Domain availability checker FAQ
Answers to the most common questions about availability accuracy and coverage.
Start checking domain availability now
Enter a keyword and instantly see which domains are available across hundreds of TLDs — accurately, efficiently, and without registrar bias.