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Check Domain Availability Across 12 TLDs
Enter a domain name above to instantly check whether it’s registered across twelve popular top-level domains: .com, .net, .org, .io, .co, .ai, .dev, .app, .me, .xyz, .info, and .biz. Our availability checker uses real-time DNS lookups to determine which variations are taken and which may be available for registration.
How the Availability Check Works
Our tool queries DNS records for each TLD variation of your domain name. If DNS records exist (typically A records pointing to a server), the domain is almost certainly registered and in use. If no DNS records are found, the domain may be available — though it could also be registered but not yet configured with DNS. For this reason, we mark results as “potentially available” rather than definitively available. Always confirm availability with a registrar before attempting to purchase.
This DNS-based approach has advantages over traditional WHOIS availability checks: it’s faster, more reliable across different TLDs, and doesn’t hit WHOIS rate limits that can block repeated lookups.
Choosing the Right TLD
.com remains the default for businesses and the most universally trusted TLD. If the .com version of your desired name is available, it should almost always be your first choice. Over 160 million .com domains are currently registered, making it the most competitive extension.
.io has become the de facto TLD for technology companies and startups, particularly in SaaS, developer tools, and crypto. It carries a tech-forward connotation and is widely recognized in the startup ecosystem. Registration costs are higher than .com, typically $30-50 per year.
.ai has surged in popularity and value since the AI boom beginning in 2023. Any domain name combining relevant keywords with .ai carries premium potential. Prices for desirable .ai domains have increased dramatically on the aftermarket.
.dev and .app are Google-operated TLDs that require HTTPS by default — they’re built with security in mind. They’re ideal for developer tools, software projects, and mobile applications.
.co is a popular .com alternative, often used by startups that can’t secure the .com version. It’s the country code for Colombia but has been heavily marketed globally as a commercial TLD.
Related Tools
Found an available domain? Before you register, check its history with our Domain Age Checker — a “new” domain might actually be a previously dropped domain with existing backlinks or a problematic past. Run a DNS Lookup to verify there are truly no existing records, and check the Domain Reputation to ensure it hasn’t been blacklisted.
