Whois Lookup

What Is a Whois / RDAP Lookup?

A Whois / RDAP lookup is an online tool that retrieves domain registration information through public RDAP endpoints such as rdap.org. It returns the registrar, registrant, status, nameservers, and creation, update, and expiration dates; IP queries also show the network name, address range, and AS number. It uses the RDAP standard protocol, so no client software needs to be installed.

Main Features

• Queries registration data for domains and IPs through public RDAP endpoints
• Shows structured fields such as registrar, registrant, contacts, and nameservers
• IP queries support network name, address range, country, and AS number
• If a query fails, you can paste the RDAP JSON to parse it manually and view the raw JSON

Use Cases / Notes

Useful for checking domain ownership and registration status, verifying expiration dates, or inspecting IP range details. Note that queries depend on public RDAP services; if you hit CORS or network issues, switch to pasting the JSON, and keep in mind that some TLDs may not have a corresponding RDAP service.

How to Use

1. Enter a domain or IP address and click "RDAP query"
2. Review the summary stats and the detailed field table in the results
3. Expand the raw JSON or copy the results if needed