Domain Check
Filter a list of domains to find which ones are available for registration, and see related TLD registrations with live site detection.
Max 25 domains per run. Uses RDAP with WHOIS fallback for the input domain only. Results are cached for faster repeat checks. Reg = registered TLDs with the same name. Active = domains with DNS (A/AAAA/CNAME).
Results
| Domain | Reg | Active | Extensions | Status |
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No results to display.
About Domain Check
How It Works
Paste a list of domain names and the tool checks each one via WHOIS to determine whether it is available for registration. For available domains, it scans common TLD extensions with the same name to show how many are already registered and which ones host active websites.
Understanding the Results
- Reg – click the number to expand all registered extensions with status
- Active – registered domains that resolve via DNS (A, AAAA, or CNAME)
- Extensions – color-coded badges for each registered TLD
- Status – whether your input domain is available or already taken
Scanned TLD Extensions
Choose Fast scan for the top 100 suffixes (.com, .net, .ai, .io, .co.uk, .de, .fr, and more), or Full scan for all 9,648 suffixes from IANA and the Public Suffix List.
Suffix lists refresh daily from IANA and publicsuffix.org. Only suffixes with RDAP support return definitive registration status; others may be skipped. Reg is shown as found/scanned.