TLD Availability
Check domain availability across all public TLDs. See which extensions are registered and available.
Check TLD Availability
Enter a domain name (without extension) to check availability across all public TLDs
How TLD Availability Check Works
This tool checks domain availability across multiple TLDs by performing fast DNS lookups. It queries both A records (IPv4) and NS records (nameservers) to determine registration status.
How It Works
- Queries DNS for A and NS records across providers
- Uses DNS-over-HTTPS (Google, Cloudflare)
- Promise.any racing for fastest results
- Domain is registered if A or NS records exist
TLDs Checked
- All publicly available TLDs (1,400+)
- Generic: .com, .net, .org, .io, .co
- Country codes: .us, .uk, .ca, .au, .de
- New gTLDs: .app, .dev, .tech, .online
Important Notes
Fast Indicator, Not Definitive
This tool uses DNS resolution as a fast way to check if domains are likely available. Some domains may exist but not have DNS records configured. For accurate confirmation, perform a full WHOIS/RDAP lookup.
Registered Domains are Clickable
Click any registered domain (shown in red) to open a full lookup in a new tab with complete WHOIS/RDAP information.
Privacy-First Design
All DNS queries are performed directly from your browser to public DNS providers (Google DNS, Cloudflare) using DNS-over-HTTPS. We don't see your searches or track what domains you're checking.