WHOIS Lookup
Lookup domain registration information using RDAP
About WHOIS / RDAP
RDAP (Registration Data Access Protocol) is the modern replacement for WHOIS.
- Uses JSON format (machine-readable)
- Standardized query protocol
- Supports internationalized domain names
- Better privacy controls
About this tool
Lookup domain registration information including registrar, creation date, expiration date, and name servers. WHOIS Lookup runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- WHOIS Lookup is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use WHOIS Lookup?
Open WHOIS Lookup, enter or paste your input, and copy the result. The page works without an account.
Related guides
WHOIS Lookup with RDAP — Registrar, Dates, and Nameservers
Use the DevTools backend RDAP pipeline for normalized domain registration data. Read registrar, dates, and nameservers from one payload.
Domain WHOIS and RDAP: Inspecting Registrar and DNS Records
How domain registration records work, registrar data, nameservers, status flags (clientTransferProhibited), and the RDAP protocol.
Related tools
API Mock Server
Define mock REST routes and intercept fetch calls client-side
Bandwidth Calculator
Estimate how long a file takes to transfer at a given connection speed — correctly handling bits vs bytes (Mbps vs MB/s) and SI vs binary size units
Broken Link Checker
Extract http(s) links from pasted HTML and check them via proxy
cURL to Code Converter
Convert cURL commands to code snippets in multiple languages. Parse cURL and generate JavaScript, Python, PHP, and more.
DNS Lookup Tool
Query DNS records and resolve domain names to IP addresses
DNS Propagation Checker
Compare DNS answers from global public resolvers and see propagation consensus instantly