Domain availability checker
Check if a domain name is taken or available to register. Checks multiple extensions at once.
How domain availability checking works
This tool checks whether a domain name is available for registration by querying domain registrar lookup APIs. A domain that returns no current registration data is likely available; one that returns active registration details (registrar, creation date, expiry) is already taken.
Domain names consist of a label (e.g., tulzu) and a Top-Level Domain or TLD (.com, .io, .co). The TLD significantly affects both availability and cost: .com is the most valuable and competitive, while newer TLDs like .io, .app, and .dev have more availability. When your preferred .com is taken, consider whether an alternative TLD fits your brand — but be aware that users tend to default to typing .com from memory. Domain registration costs range from $10–15/year for common TLDs to hundreds for premium domains. Renewals are ongoing — factor in annual renewal costs and enable auto-renew to avoid accidental expiry.