Is this tool free and do I need an account?

It is free to use without an account. Domain checks have request limits to protect public services. Results can be downloaded from this page.

Where is my input processed?

Checks run on our server and contact public DNS, registry, website or Ahrefs services as needed. Results can be cached; inputs are not added to your URL or account. Do not submit private addresses or secrets.

What should I check before using the result?

Uses HTTPS RDAP, not legacy port-43 WHOIS. Results include public registration metadata, not owner contacts. Registry rate limits or missing coverage can leave rows unavailable. No availability-to-register claim is made.

Bulk WHOIS lookup

Compare public registration details for up to 10 domains and download a timestamped CSV.

A report you can act on

Enter your domains to see measured values, sources and check times. Missing records, unsupported services and temporary failures are shown separately.

From input to output

How to use it

IANA RDAP registry ↗

Paste up to 10 domains, one per line.
Each domain is checked independently with bounded concurrency.
Review the table or export CSV; failures and unsupported registries have their own rows.

Good to know

Is this tool free and do I need an account?: It is free to use without an account. Domain checks have request limits to protect public services. Results can be downloaded from this page.
Where is my input processed?: Checks run on our server and contact public DNS, registry, website or Ahrefs services as needed. Results can be cached; inputs are not added to your URL or account. Do not submit private addresses or secrets.
What should I check before using the result?: Uses HTTPS RDAP, not legacy port-43 WHOIS. Results include public registration metadata, not owner contacts. Registry rate limits or missing coverage can leave rows unavailable. No availability-to-register claim is made.

Bulk WHOIS lookup

Run a domain check

A report you can act on

How to use it

Good to know

Bulk WHOIS lookup

Run a domain check

A report you can act on

How to use it

Good to know